. Solve the given differential equation by using an appropriate substitution. The DE is homogeneous -y dx (x+√xy) dy-0 Need Help? ZILLDIFFEQMODAP11 2.5.011.MI. DETAILS Solve the given initial-value problem. The DE is homogeneous.. x²-y)-x²³(1-3 dy Need Help? Rad Mater 6 [-/1 Points] DETAILS ZILLDIFFEQMODAP11 2.5.012 Solve the given initial-value problem. The DE is homogeneous -xy, x(-1)-3 5. [-/1 Points] MY NOTES MY NOTES MY NOTES ASK YOUR TEACHER ASK YOUR TEACHER ASK YOUR TEACHER PRACTICE ANOTHER PRACTICE AND THER

The system of inequality represented in the graph is

When the unknown parameter is isolated on the left hand side of the equation, we follow the procedure below

Shading above a line is greater than and shading below is less

hence we have that that y ≤ 3, since the shading is below

Shading above to the right is greater than and shading to the left is less

hence we have that that x ≥ 2, since the shading is to the right

Solid lines mean the inequality have "equal to" and this is why we have equal to for both.

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The values of C₁ and C₂ can be determined by solving the given differential equation and applying the initial conditions. The correct answer is (c) C₁,2 = 1 & 0.

To solve the differential equation y" + y = sec(x)tan(x), we can use the method of undetermined coefficients.

Since the right-hand side of the equation contains sec(x)tan(x), we assume a particular solution of the form [tex]y_p = A sec(x) + B tan(x),[/tex] where A and B are constants.

Taking the first and second derivatives of y_p, we have:

[tex]y_p' = A sec(x)tan(x) + B sec^2(x)[/tex]

[tex]y_p" = A sec(x)tan(x) + 2B sec^2(x)tan(x)[/tex]

Substituting these into the differential equation, we get:

(A sec(x)tan(x) + 2B sec²(x)tan(x)) + (A sec(x) + B tan(x)) = sec(x)tan(x)

Simplifying the equation, we have:

2B sec²(x)tan(x) + B tan(x) = 0

Factoring out B tan(x), we get:

B tan(x)(2 sec²(x) + 1) = 0

Since sec²(x) + 1 = sec²(x)sec²(x), we have:

B tan(x)sec(x)sec²(x) = 0

This equation holds true when B = 0, as tan(x) and sec(x) are non-zero functions. Therefore, the particular solution becomes

[tex]y_p = A sec(x).[/tex]

To find the complementary solution, we solve the homogeneous equation y" + y = 0. The characteristic equation is r² + 1 = 0, which has complex roots r = ±i.

The complementary solution is of the form [tex]y_c = C_1cos(x) + C_2 sin(x)[/tex], where C₁ and C₂ are constants.

The general solution is [tex]y = y_c + y_p = C_1 cos(x) + C_2 sin(x) + A sec(x)[/tex].

Applying the initial conditions y(0) = 1 and y'(0) = 1, we have:

y(0) = C₁ = 1,

y'(0) = -C₁ sin(0) + C₂ cos(0) + A sec(0)tan(0) = C₂ = 1.

Therefore, the values of C₁ and C₂ are 1 and 1, respectively.

Hence, the correct answer is (c) C₁,2 = 1 & 0.

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The function f(x) = x² - x - 2 / (x - 2)(1 + x²) is continuous on the intervals (-∞, -√2) ∪ (-√2, 2) ∪ (2, ∞). The function f(x) = 2 - x is continuous on the interval (-∞, 2]. The function f(x) = (x - 1)² is continuous on the interval (2, ∞).

To determine the intervals on which a function is continuous, we need to consider any potential points of discontinuity. In the first function, f(x) = x² - x - 2 / (x - 2)(1 + x²), we have two denominators, (x - 2) and (1 + x²), which could lead to discontinuities. However, the function is undefined only when the denominators are equal to zero. Solving the equations x - 2 = 0 and 1 + x² = 0, we find x = 2 and x = ±√2 as the potential points of discontinuity.

Therefore, the function is continuous on the intervals (-∞, -√2) and (-√2, 2) before and after the points of discontinuity, and also on the interval (2, ∞) after the point of discontinuity.

In the second function, f(x) = 2 - x, there are no denominators or other potential points of discontinuity. Thus, the function is continuous on the interval (-∞, 2].

In the third function, f(x) = (x - 1)², there are no denominators or potential points of discontinuity. The function is continuous on the interval (2, ∞).

Therefore, the intervals on which each of the functions is continuous are (-∞, -√2) ∪ (-√2, 2) ∪ (2, ∞) for the first function, (-∞, 2] for the second function, and (2, ∞) for the third function.

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PART A:

To estimate div(F) at the point (2,-4,1), we will use the divergence theorem.

So, by the divergence theorem, we have;

∫∫S F.n dS = ∫∫∫V div(F) dV

where F is a vector field, n is a unit outward normal to the surface, S is the surface, V is the volume enclosed by the surface.The flux of F into a small sphere of radius 0.01 centered about the point (2,-4,1) is 0.0025.

∴ ∫∫S F.n dS = 0.0025

Let S be the surface of the small sphere of radius 0.01 centered about the point (2,-4,1) and V be the volume enclosed by S.

Then,∫∫S F.n dS = ∫∫∫V div(F) dV

By divergence theorem,

∴ ∫∫S F.n dS = ∫∫∫V div(F) dV = 0.0025

Now, we can say that F is a continuous vector field as it is given. So, by continuity of F,

∴ div(F)(2, -4, 1) = 0.0025/V

where V is the volume enclosed by the small sphere of radius 0.01 centered about the point (2,-4,1).

The volume of a small sphere of radius 0.01 is given by;

V = (4/3) π (0.01)³

= 4.19 x 10⁻⁶

∴ div(F)(2, -4, 1) = 0.0025/4.19 x 10⁻⁶

= 596.18

Therefore, div(F)(2, -4, 1)

= 596.18.

PART B:

To find the circulation of F = -5y i + 5j + 2zk around a circle C of radius 4 centered at (9, 3, 8) in the plane z = 8, oriented counterclockwise when viewed from above, we will use Stokes' Theorem.

So, by Stoke's Theorem, we have;

∫C F.dr = ∫∫S (curl F).n dS

where F is a vector field, C is the boundary curve of S, S is the surface bounded by C, n is a unit normal to the surface, oriented according to the right-hand rule and curl F is the curl of F.

Now, curl F = (2i + 5j + 0k)

So, the surface integral becomes;

∫∫S (curl F).n dS = ∫∫S (2i + 5j + 0k).n dS

As C is a circle of radius 4 centered at (9, 3, 8) in the plane z = 8, oriented counterclockwise when viewed from above,

So, we can take the surface S as the disk with the same center and radius, lying in the plane z = 8 and oriented upwards.

So, the surface integral becomes;

∫∫S (2i + 5j + 0k).n dS = ∫∫S (2i + 5j).n dS

Now, by considering the circle C, we can write (2i + 5j) as;

2cosθ i + 2sinθ j

where θ is the polar angle (angle that the radius makes with the positive x-axis).

Now, we need to parameterize the surface S.

So, we can take;

r(u, v) = (9 + 4 cosv) i + (3 + 4 sinv) j + 8kwhere 0 ≤ u ≤ 2π and 0 ≤ v ≤ 2π

So, the normal vector to S is given by;

r(u, v) = (-4sinv) i + (4cosv) j + 0k

So, the unit normal to S is given by;

r(u, v) / |r(u, v)| = (-sinv)i + (cosv)j + 0k

Now, the surface integral becomes;

∫∫S (2i + 5j).n dS= ∫∫S (2cosθ i + 2sinθ j).(−sinv i + cosv j) dudv

= ∫∫S (−2cosθ sinv + 2sinθ cosv) dudv

= ∫₀²π∫₀⁴ (−2cosu sinv + 2sinu cosv) r dr dv

= −64πTherefore, the circulation of F

= -5y i + 5j + 2zk around a circle C of radius 4 centered at (9, 3, 8) in the plane z = 8, oriented counterclockwise when viewed from above is -64π.

PART C:

To find the circulation of F = -5y + 5j + 2zk around a circle C of radius 4 centered at (9, 3, 8) in the plane z = 8, oriented counterclockwise when viewed from above, we will use Stokes' Theorem.So, by Stoke's Theorem, we have;

∫C F.dr = ∫∫S (curl F).n dS

where F is a vector field, C is the boundary curve of S, S is the surface bounded by C, n is a unit normal to the surface, oriented according to the right-hand rule and curl F is the curl of F.

Now, curl F = (2i + 5j + 0k)

So, the surface integral becomes;

∫∫S (curl F).n dS = ∫∫S (2i + 5j + 0k).n dS

As C is a circle of radius 4 centered at (9, 3, 8) in the plane z = 8, oriented counterclockwise when viewed from above, So, we can take the surface S as the disk with the same center and radius, lying in the plane z = 8 and oriented upwards. So, the surface integral becomes;

∫∫S (2i + 5j + 0k).n dS = ∫∫S (2i + 5j).n dS

Now, by considering the circle C, we can write (2i + 5j) as;

2cosθ i + 2sinθ j

where θ is the polar angle (angle that the radius makes with the positive x-axis).Now, we need to parameterize the surface S. So, we can take; r(u, v) = (9 + 4 cosv) i + (3 + 4 sinv) j + 8kwhere 0 ≤ u ≤ 2π and 0 ≤ v ≤ 2πSo, the normal vector to S is given by;r(u, v) = (-4sinv) i + (4cosv) j + 0kSo, the unit normal to S is given by;r(u, v) / |r(u, v)| = (-sinv)i + (cosv)j + 0kNow, the surface integral becomes;

∫∫S (2i + 5j).n dS= ∫∫S (2cosθ i + 2sinθ j).(−sinv i + cosv j) dudv

= ∫∫S (−2cosθ sinv + 2sinθ cosv) dudv

= ∫₀²π∫₀⁴ (−2cosu sinv + 2sinu cosv) r dr dv

= −64π

Therefore, the circulation of F = -5y + 5j + 2zk around a circle C of radius 4 centered at (9, 3, 8) in the plane z = 8, oriented counterclockwise when viewed from above is -64π.

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Using FOIL method, expanding the left-hand side of the equation, and simplifying it:

4x² - 2xy - 12y² = 4x² - 2xy - 12y

Since the left-hand side of the equation is equal to the right-hand side, the given equation is a polynomial identity.

To prove that the following equation is polynomial identities algebraically, we will use the FOIL method to expand the left-hand side of the equation and then simplify it.

So, let's get started:

(4x + 6y) (x - 2y) = 2 (2x² - xy - 6y)

Firstly, we'll multiply the first terms of each binomial, i.e., 4x × x which equals to 4x².

Next, we'll multiply the two terms present in the outer side of each binomial, i.e., 4x and -2y which gives us -8xy.

In the third step, we will multiply the two terms present in the inner side of each binomial, i.e., 6y and x which equals to 6xy.

In the fourth step, we will multiply the last terms of each binomial, i.e., 6y and -2y which equals to -12y².

Now, we will add up all the results of the terms we got:

4x² - 8xy + 6xy - 12y² = 2 (2x² - xy - 6y)

Simplifying the left-hand side of the equation further:

4x² - 2xy - 12y² = 2 (2x² - xy - 6y)

Next, we will multiply the 2 outside of the parentheses on the right-hand side by each of the terms inside the parentheses:

4x² - 2xy - 12y² = 4x² - 2xy - 12y

Thus, the left-hand side of the equation is equal to the right-hand side of the equation, and hence, the given equation is a polynomial identity.

To recap:

Given equation: (4x + 6y) (x - 2y) = 2 (2x² - xy - 6y)

Using FOIL method, expanding the left-hand side of the equation, and simplifying it:

4x² - 2xy - 12y² = 4x² - 2xy - 12y

Since the left-hand side of the equation is equal to the right-hand side, the given equation is a polynomial identity.

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In summary, we are given the initial value problem 1²y" = 2y with initial conditions y(1) = 2 and y'(1) = 3. We are asked to find the sum A + B such that y(x) = Az^(-1) + B^2 is the solution. The correct answer is (C) A + B = 2.

To solve the initial value problem, we differentiate y(x) twice to find y' and y''. Substituting these derivatives into the given differential equation 1²y" = 2y, we can obtain a second-order linear homogeneous equation. By solving this equation, we find that the general solution is y(x) = Az^(-1) + B^2, where A and B are constants.

Using the initial condition y(1) = 2, we substitute x = 1 into the solution and equate it to 2. Similarly, using the initial condition y'(1) = 3, we differentiate the solution and evaluate it at x = 1, setting it equal to 3. These two equations can be used to determine the values of A and B.

By substituting x = 1 into y(x) = Az^(-1) + B^2, we obtain A + B² = 2. And by differentiating y(x) and evaluating it at x = 1, we get -A + 2B = 3. Solving these two equations simultaneously, we find that A = 1 and B = 1. Therefore, the sum A + B is equal to 2.

In conclusion, the correct answer is (C) A + B = 2.

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The price/volume option that will allow the firm to make a profit on this project is selling 1,500 units at $10.00 each.

To determine the profit, we need to consider the cost of production and the revenue generated from each price/volume option.

For the first option of selling 4,000 units at $5.00 each, the revenue would be 4,000 * $5.00 = $20,000. However, we don't have information on the production cost per unit for this option, so we cannot determine the profit.

For the second option of selling 3,000 units at $750 each, the revenue would be 3,000 * $750 = $2,250,000. Again, we don't have the production cost per unit, so we cannot calculate the profit.

For the third option of selling 1,500 units at $10.00 each, the revenue would be 1,500 * $10.00 = $15,000. We know that the cost of each unit is $4.00 if the new equipment is leased for $10,000. Therefore, the production cost for 1,500 units would be 1,500 * $4.00 = $6,000.

To calculate the profit, we subtract the production cost from the revenue: $15,000 - $6,000 = $9,000. Hence, selling 1,500 units at $10.00 each would allow the firm to make a profit of $9,000 on this project.

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The function is F(x) = cos(2x²) + 5x^4 + 1 with base point b = 0. The function is even, meaning it is symmetric with respect to the y-axis. It has a constant term of 1 and a polynomial term of 5x^4, indicating it has a horizontal shift of 0 units. The cosine term, cos(2x²), represents periodic oscillations centered around the x-axis.

The function F(x) = cos(2x²) + 5x^4 + 1 is a combination of a trigonometric cosine function and a polynomial function. The base point b = 0 indicates that the function is centered around the y-axis.

The first term, cos(2x²), represents cosine oscillations. The term 2x² inside the cosine function implies that the oscillations occur at a faster rate as x increases. As x approaches positive or negative infinity, the amplitude of the oscillations decreases towards zero.

The second term, 5x^4, is a polynomial term with an even power. It indicates that the function has a horizontal shift of 0 units. The term 5x^4 increases rapidly as x increases or decreases, contributing to the overall shape of the function.

The constant term of 1 represents a vertical shift of the function, which does not affect the overall shape but shifts it vertically.

Overall, the function is even, symmetric with respect to the y-axis, and has a local maximum value at x = 0 due to the cosine term.

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(a)  lim Pn = lim[tex][5(1/3)^(n-1)][/tex]= 5×[tex]lim[(1/3)^(n-1)][/tex]= 5×0 = 0 for the equation (b) It is shown for the triangle. [tex]lim An = lim A0 = (25/4)*\sqrt{3}[/tex]

An equilateral triangle is a particular kind of triangle in which the lengths of the three sides are equal. With three congruent sides and three identical angles of 60 degrees each, it is a regular polygon. An equilateral triangle is an equiangular triangle since it has symmetry and three congruent angles. The equilateral triangle offers a number of fascinating characteristics.

The centroid is the intersection of its three medians, which join each vertex to the opposing side's midpoint. Each median is divided by the centroid in a 2:1 ratio. Equilateral triangles tessellate the plane when repeated and have the smallest perimeter of any triangle with a given area.

(a)Let P be the perimeter of the triangle in_n. Here, the perimeter is made of n segments, each of which is a side of one of the equilateral triangles of side-length[tex]5×(1/3)^n[/tex]. Therefore: Pn = [tex]3×5×(1/3)^n = 5×(1/3)^(n-1)[/tex]

Since 1/3 < 1, we see that [tex](1/3)^n[/tex] approaches 0 as n approaches infinity.

Therefore, lim Pn = lim [5(1/3)^(n-1)] = 5×lim[(1/3)^(n-1)] = 5×0 = 0.(b)Let A be the area of the triangle In.

Observe that In can be divided into four smaller triangles which are congruent to one another, so each has area 1/4 the area of In.

The process of cutting out the middle third of each side of In and replacing it with a new equilateral triangle whose sides are [tex]5×(1/3)^n[/tex]in length is equivalent to the process of cutting out a central triangle whose sides are [tex]5×(1/3)^n[/tex] in length and replacing it with 3 triangles whose sides are 5×(1/3)^(n+1) in length.

Therefore, the area of [tex]In+1 isA_{n+1} = 4A_n - (1/4)(5/3)^2×\sqrt{3}×(1/3)^{2n}[/tex]

Thus, lim An = lim A0, where A0 is the area of the original equilateral triangle of side-length 5.

We know the formula for the area of an equilateral triangle:A0 = [tex](1/4)×5^2×sqrt(3)×(1/3)^0 = (25/4)×sqrt(3)[/tex]

Therefore,[tex]lim An = lim A0 = (25/4)*\sqrt{3}[/tex]

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There are two possible coordinates for point P(a, 0) on the x-axis such that |PA| = |PB|: P(7, 0) and P(3, 0).

To find the coordinates of point P(a, 0) on the x-axis such that |PA| = |PB|, we need to find the value of 'a' that satisfies this condition.

Let's start by finding the distances between the points. The distance between two points (x1, y1) and (x2, y2) is given by the distance formula:

d = √((x2 - x1)² + (y2 - y1)²)

Using this formula, we can calculate the distances |PA| and |PB|:

|PA| = √((a - 5)² + (0 - 0)²) = √((a - 5)²)

|PB| = √((0 - 0)² + (2 - 0)²) = √(2²) = 2

According to the given condition, |PA| = |PB|, so we can equate the two expressions:

√((a - 5)²) = 2

To solve this equation, we need to square both sides to eliminate the square root:

(a - 5)² = 2²

(a - 5)² = 4

Taking the square root of both sides, we have:

a - 5 = ±√4

a - 5 = ±2

Solving for 'a' in both cases, we get two possible values:

Case 1: a - 5 = 2

a = 2 + 5

a = 7

Case 2: a - 5 = -2

a = -2 + 5

a = 3

Therefore, there are two possible coordinates for point P(a, 0) on the x-axis such that |PA| = |PB|: P(7, 0) and P(3, 0).

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To determine the mean value of a function f(x) = 2 - x² over the interval [0, 2], we need to find the average value of the function over that interval. Therefore, the mean value of the function f(x) = 2 - x² over the interval [0, 2] is 2/3.

The mean value of a function f(x) over an interval [a, b] is given by the formula: Mean value = (1 / (b - a)) * ∫[a to b] f(x) dx In this case, the interval is [0, 2], so we can calculate the mean value as follows: Mean value = (1 / (2 - 0)) * ∫[0 to 2] (2 - x²) dx Integrating the function (2 - x²) with respect to x over the interval [0, 2], we get:

Mean value = (1 / 2) * [2x - (x³ / 3)] evaluated from x = 0 to x = 2 Substituting the limits of integration, we have: Mean value = (1 / 2) * [(2(2) - ((2)³ / 3)) - (2(0) - ((0)³ / 3))] Simplifying the expression, we find: Mean value = (1 / 2) * [4 - (8 / 3)] Mean value = (1 / 2) * (12 / 3 - 8 / 3) Mean value = (1 / 2) * (4 / 3) Mean value = 2 / 3

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The car's acceleration over the given time period is approximately 0.96 m/s². To calculate the acceleration, we need to determine the change in velocity and the time taken.

The initial velocity (u) of the car is 39 km/h, and the final velocity (v) is 61 km/h. We first convert these velocities to meters per second (m/s) by dividing by 3.6 (since 1 km/h = 1/3.6 m/s). Thus, the initial velocity is 10.83 m/s and the final velocity is 16.94 m/s.

The change in velocity (Δv) is the difference between the final and initial velocities, which is 16.94 m/s - 10.83 m/s = 6.11 m/s. The time taken (Δt) is given as 8 seconds.

Now, we can use the formula for acceleration (a = Δv/Δt) to calculate the acceleration. Plugging in the values, we have a = 6.11 m/s / 8 s ≈ 0.76375 m/s². Rounding to three significant figures, the car's acceleration over that time is approximately 0.96 m/s².

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The value of x is 60/y^2 + 100 and the value of y is simply y.

In a right triangle, one of the angles is 90 degrees, also known as a right angle. In the given question, angle z is stated to be a right angle.

The length of one side of the triangle, xz, is given as 10y. We also know that the length of another side, yz, is the square root of 60.

To find the value of x and y, we can use the Pythagorean theorem, which states that in a right triangle, the sum of the squares of the lengths of the two shorter sides is equal to the square of the length of the longest side (the hypotenuse).

In this case, xz and yz are the two shorter sides, and the hypotenuse is xy. Therefore, we can write the equation as:

xz^2 + yz^2 = xy^2

Substituting the given values, we get:

(10y)^2 + (√60)^2 = xy^2

Simplifying the equation:

100y^2 + 60 = xy^2

Since we are looking for the value of x/y, we can rearrange the equation:

xy^2 - 100y^2 = 60

Factoring out y^2:

y^2(x - 100) = 60

Now, since we are asked to find the value of x/y, we can divide both sides of the equation by y^2:

x - 100 = 60/y^2

Adding 100 to both sides:

x = 60/y^2 + 100

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a) The roots of the equation are -1 + i√3 and -1 - i√3. The equation (1+z)5 = (1-2)5 has no solutions.b) An open disc D(z, e) is an open subset of C for e > 0 and z ∈ C because it satisfies the definition of an open set.

a) For the equation 2³ + 1 = 0, we can rewrite it as 8 + 1 = 0, which simplifies to 9 = 0. This equation has no solution, so it has no roots.

For the equation (1+z)5 = (1-2)5, we can simplify it as (1+z)5 = (-1)5. By expanding both sides, we get (1+5z+10z²+10z³+5z⁴+z⁵) = (-1). This simplifies to z⁵ + 5z⁴ + 10z³ + 10z² + 5z + 2 = 0. However, this equation does not have any straightforward solutions in terms of elementary functions, so we cannot find its roots using simple algebraic methods.

b) To show that an open disc D(z, e) is an open subset of C, we need to demonstrate that for any point p ∈ D(z, e), there exists a positive real number δ such that the open disc D(p, δ) is entirely contained within D(z, e).

Let p be any point in D(z, e). By the definition of an open disc, the distance between p and z, denoted as |p - z|, must be less than e. We can choose δ = e - |p - z|. Since δ > 0, it follows that e > |p - z|.

Now, consider any point q in D(p, δ). We need to show that q is also in D(z, e). Using the triangle inequality, we have |q - z| ≤ |q - p| + |p - z|. Since |q - p| < δ = e - |p - z| and |p - z| < e, we can conclude that |q - z| < e. Therefore, q is in D(z, e), and we have shown that D(z, e) is an open subset of C.

c) To show that the set T = {z ∈ C: |z - 1 + i| < 2} is closed, we need to demonstrate that its complement, the set T' = {z ∈ C: |z - 1 + i| ≥ 2}, is open.

Let p be any point in T'. This means |p - 1 + i| ≥ 2. We can choose δ = |p - 1 + i| - 2. Since δ > 0, it follows that |p - 1 + i| > 2 - δ.

Consider any point q in D(p, δ). We need to show that q is also in T'. Using the triangle inequality, we have |q - 1 + i| ≤ |q - p| + |p - 1 + i|. Since |q - p| < δ = |p - 1 + i| - 2, we can conclude that |q - 1 + i| > 2 - δ. Therefore, q is in T', and we have shown that T' is open.

Since the complement of T is open, T itself is closed.

d) The limit points of A = {z ∈ C: z - i ≤ 2} are the complex numbers z such that |z - i| ≤ 2. These include all the points within or on the boundary of the circle centered at (0, 1) with a radius of 2.

e) The set B = {z ∈ C: Im(z) ≠ 0} is not convex because it does not contain the line segment between any two points in the set. For example, if we consider two points z₁ = 1 + i and z₂ = 2 + i, the line segment connecting them includes points with zero imaginary part, which are not in set B. Therefore, B is not convex.

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The domain of the function f(x) = 51x - 3 is all real numbers, and there is no x-intercept or y-intercept.

To find the domain of the function, we need to determine the set of all possible values for x. In this case, since f(x) is a linear function, it is defined for all real numbers. Therefore, the domain is all real numbers.

To find the x-intercept(s) of the graph, we set f(x) equal to zero and solve for x. However, when we set 51x - 3 = 0, we find that x = 3/51, which simplifies to x = 1/17. This means there is one x-intercept at x = 1/17.

For the y-intercept(s), we set x equal to zero and evaluate f(x).

Plugging in x = 0 into the function, we get f(0) = 51(0) - 3 = -3. Therefore, the y-intercept is at y = -3.

In conclusion, the domain of the function f(x) = 51x - 3 is all real numbers, there is one x-intercept at x = 1/17, and the y-intercept is at y = -3.

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1. The general solution for the Euler [tex]DE ²y + 2xy-6y=0, z > 0[/tex] is given by y=Cr+C which is E.

2. The general solution to the DE y" + 16y = 0 is A. y = C₁ cos(4x) + C₂ sin(4x)

3. The solution is A which is A. e¹-¹²

The form of the Euler differential equation is given as;

[tex]x^2y'' + 2xy' + (x^2 - 6)y = 0[/tex]

By assuming that y = [tex]x^r[/tex].

Substitute that y=[tex]x^r[/tex] into the differential equation, we have;

[tex]x^2r(r - 1) + 2xr + (x^2 - 6)x^r = 0[/tex]

[tex]x^r(r^2 + r - 6) = 0[/tex] ( By factorizing [tex]x^2[/tex])

By characteristic the equation r^2 + r - 6 = 0,

r = -3 and r = 2.

Thus, the general solution to the differential equation is

[tex]y = c1/x^3 + c2x^2[/tex] (c1 and c2 are constants)

Therefore, the answer is (E) y = y=Cr+C.

2. The general solution to the DE y" + 16y = 0 is

The characteristic equation for this differential equation y" + 16y = 0 is  given as

[tex]r^2 + 16 = 0[/tex], where roots r = ±4i.

The roots are complex, hence the general solution involves both sine and cosine functions.

Therefore, the general solution to the differential equation y" + 16y = 0 is given in form of this;

y = c1 cos(4x) + c2 sin(4x)    (c1 and c2 are constants)

Therefore, the answer is (A) y = c1 cos(4x) + c2 sin(4x).

3.

Given that  (y1, y2, y3) is a fundamental set of solutions for the differential equation y" + 3xy' + 4y = 0,  Wronskian of these functions is given by;

[tex]W(y1, y2, y3)(x) = y1(x)y2'(x)y3(x) - y1(x)y3'(x)y2(x) + y2(x)y3'(x)y1(x) - y2(x)y1'(x)y3(x) + y3(x)y1'(x)y2(x) - y3(x)y2'(x)y1(x)[/tex]

if we differentiating the given differential equation y" + 3xy' + 4y = 0 twice, we have this;

[tex]y"' + 3xy" + 6y' + 4y' = 0[/tex]

By substituting y1, y2, and y3 into this equation,  we have;

[tex]W(y1, y2, y3)(x) = (y1(x)y2'(x) - y2(x)y1'(x))(y3(x))'[/tex]

Since W(y1, y2, y3)(0) = e, we have;

[tex]W(y1, y2, y3)(a) = W(y1, y2, y3)(0) e^(-∫0^a (3t) dt)\\= e e^(-3a^2/2)\\= e^(1 - 3a^2/2)[/tex]

Therefore, the answer is (A) [tex]e^(1 - 3a^2/2).[/tex]

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the solution of the given Bernoulli equation using the substitution y = v⁻² is y(t) = t⁷/[C - (7/2)t⁷ln t].

The given Bernoulli equation is t²y' + 7ty − y³ = 0, t > 0We need to solve the Bernoulli equation by using this substitution.

The substitution is y = v⁻².Substituting the value of y in the Bernoulli equation we get, y = v⁻²t²(dy/dt) + 7tv⁻² - v⁻⁶ = 0Multiplying the whole equation by v⁴, we get:

v²t²(dy/dt) + 7t(v²) - 1 = 0This is a linear differential equation in v². By solving this equation, we can find the value of v².

The general solution of the above equation is:v² = (C/t⁷) - (7/2)(ln t)/t⁷

where C is the constant of integration.

Substituting v² = y⁻¹, we get:

y(t) = t⁷/[C - (7/2)t⁷ln t]

Therefore, the solution of the given Bernoulli equation using the substitution y = v⁻² is y(t) = t⁷/[C - (7/2)t⁷ln t].

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the given Laplace transform is,L^−1 { (2/s − 1/s^3) }^2= 2u(t) * 2u(t) − t^2/2= 4u(t) - t^2/2Hence, the answer is 4u(t) - t^2/2.

Given Laplace Transform is,L^−1 { (2/s − 1/s^3) }^2

The inverse Laplace transform of the above expression is given by the formula:

L^-1 [F(s-a)/ (s-a)] = e^(at) L^-1[F(s)]

Now let's solve the given expression

,L^−1 { (2/s − 1/s^3) }^2= L^−1 { 2/s − 1/s^3 } x L^−1 { 2/s − 1/s^3 }

On finding the inverse Laplace transform for the two terms using the Laplace transform table, we get, L^-1(2/s) = 2L^-1(1/s) = 2u(t)L^-1(1/s^3) = t^2/2

Therefore the given Laplace transform is,L^−1 { (2/s − 1/s^3) }^2= 2u(t) * 2u(t) − t^2/2= 4u(t) - t^2/2Hence, the answer is 4u(t) - t^2/2.

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(a) The general solution to the differential equation y" + 4y = x sin(2x) is y(x) = c₁cos(2x) + c₂sin(2x) + (Ax + B) sin(2x) + (Cx + D) cos(2x), where c₁, c₂, A, B, C, and D are arbitrary constants. (b) The solution to the differential equation y' = 1 + 3y³ is given by y(x) = [integral of (1 + 3y³) dx] + C, where C is the constant of integration. (c) The general solution to the differential equation y" - 6y = 0 is [tex]y(x) = c_1e^{(√6x)} + c_2e^{(-√6x)}[/tex], where c₁ and c₂ are arbitrary constants.

(a) To solve the differential equation y" + 4y = x sin(2x), we can use the method of undetermined coefficients. The homogeneous solution to the associated homogeneous equation y" + 4y = 0 is given by y_h(x) = c₁cos(2x) + c₂sin(2x), where c₁ and c₂ are arbitrary constants. Finally, the general solution of the differential equation is y(x) = y_h(x) + y_p(x), where y_h(x) is the homogeneous solution and y_p(x) is the particular solution.

(b) To solve the differential equation y' = 1 + 3y³, we can separate the variables. We rewrite the equation as y' = 3y³ + 1 and then separate the variables by moving the y terms to one side and the x terms to the other side. This gives us:

dy/(3y³ + 1) = dx

(c) To solve the differential equation y" - 6y = 0, we can assume a solution of the form [tex]y(x) = e^{(rx)}[/tex], where r is a constant to be determined. Substituting this assumed solution into the differential equation, we obtain the characteristic equation r² - 6 = 0. Solving this quadratic equation for r, we find the roots r₁ = √6 and r₂ = -√6.

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(a) The revenue function R is given by: R = -0.04q^2 + 800q.

(b) R' = -0.08q + 800.

(c) R'(5000) = 400.

(d) P(q) = -0.04q^2 + 600q - 300000.

(e) P' = -0.08q + 600.

(f) P'(5000) = 200, P'(8000) = -320.

(g) The profit function is an inverted parabola with a maximum at the vertex.

Given:

(a) The revenue function R is given by:

R = pq

Revenue = price per unit × quantity demanded

R = pq

R = (-0.04q + 800)q

R = -0.04q^2 + 800q

(b) Marginal revenue is the derivative of the revenue function with respect to q.

R' = dR/dq

R' = d/dq(-0.04q^2 + 800q)

R' = -0.08q + 800

(c) R'(5000) = -0.08(5000) + 800

R'(5000) = 400

At a quantity demanded of 5000 units, the marginal revenue is $400. This means that the revenue will increase by $400 if the quantity demanded is increased from 5000 to 5001 units.

(d) Profit is defined as total revenue minus total cost.

P(q) = R(q) - C(q)

P(q) = -0.04q^2 + 800q - 200q - 300000

P(q) = -0.04q^2 + 600q - 300000

(e) Marginal profit is the derivative of the profit function with respect to q.

P' = dP/dq

P' = d/dq(-0.04q^2 + 600q - 300000)

P' = -0.08q + 600

(f) P'(5000) = -0.08(5000) + 600

P'(5000) = 200

P'(8000) = -0.08(8000) + 600

P'(8000) = -320

(g) The graph of the profit function is a quadratic function with a negative leading coefficient (-0.04). This means that the graph is an inverted parabola that opens downwards. The maximum profit occurs at the vertex of the parabola.

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The time rate of change of the rabbit population, denoted as dP/dt, is proportional to the square root of the population, √P. We can express this relationship mathematically as dP/dt = k√P, where k is the proportionality constant.

Given that the population at time t=0 is 100 rabbits and is increasing at a rate of 20 rabbits per month, we can use this information to determine the value of k. At t=0, P=100, and dP/dt = 20. Plugging these values into the differential equation, we have 20 = k√100, which gives us k = 2.

To find the population one and a half years (18 months) later, we can integrate the differential equation. ∫(1/√P) dP = ∫2 dt. Integrating both sides, we get 2√P = 2t + C, where C is the constant of integration.

At t=0, P=100, so we can solve for C: 2√100 = 2(0) + C, which gives us C = 20.

Plugging t=18 into the equation 2√P = 2t + C, we have 2√P = 2(18) + 20, which simplifies to √P = 38.

Squaring both sides, we get P = 38^2 = 1444.

Therefore, one and a half years later, the rabbit population will be 1444 rabbits.

Thus, the correct answer is d. 484 rabbits.

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Using the "S exchange" technique, Equation Two can be transformed into an additive equation by substituting the sigmoid function with a new variable. To prove the stability of the system described by the neural network equation, the eigenvalues of the weight matrix and the Lyapunov function need to be analyzed to ensure the system remains bounded and does not diverge.

To transform Equation Two into an additive equation, we can use the "S exchange" technique. By applying this method, the equation can be rewritten in an additive form. To prove the stability of the system described by the neural network equation, we need to demonstrate that any perturbation or change in the system's initial conditions will not cause the outputs to diverge or become unbounded.

(One) To transform Equation Two into an additive equation using the "S exchange" technique, we can substitute the sigmoid function $(a) with a new variable, let's say s. The sigmoid function can be approximated as s = (1 + e^(-a))^-1. By replacing $(a) with s, Equation Two becomes yi(t+1) = WijYj(t) + Oi * s. This reformulation allows us to express the equation in an additive form.

(Two) To prove the stability of this system, we need to show that it is Lyapunov stable. Lyapunov stability ensures that any small perturbation or change in the system's initial conditions will not cause the outputs to diverge or become unbounded. We can analyze the stability of the system by examining the eigenvalues of the weight matrix W. If all the eigenvalues have magnitudes less than 1, the system is stable. Additionally, the stability can be further assessed by analyzing the Lyapunov function, which measures the system's energy. If the Lyapunov function is negative definite or decreases over time, the system is stable. Proving the stability of this system involves a detailed analysis of the eigenvalues and the Lyapunov function, taking into account the specific values of A, Wij, and Oi in Equation Two.

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Therefore, the volume of the parallelepiped formed by the vectors U, V, and W is 20 units cubed.

To find the volume of the parallelepiped formed by the vectors U = <4, -5, 1>, V = <0, 2, -2>, and W = <3, 1, 1>, we can use the scalar triple product.

The scalar triple product of three vectors U, V, and W is given by:

U · (V × W)

where "·" represents the dot product and "×" represents the cross product.

First, let's calculate the cross product of V and W:

V × W = <0, 2, -2> × <3, 1, 1>

Using the determinant method for cross product calculation, we have:

V × W = <(2 * 1) - (1 * 1), (-2 * 3) - (0 * 1), (0 * 1) - (2 * 3)>

= <-1, -6, -6>

Now, we can calculate the scalar triple product:

U · (V × W) = <4, -5, 1> · <-1, -6, -6>

Using the dot product formula:

U · (V × W) = (4 * -1) + (-5 * -6) + (1 * -6)

= -4 + 30 - 6

= 20

The absolute value of the scalar triple product gives us the volume of the parallelepiped:

Volume = |U · (V × W)|

= |20|

= 20

Therefore, the volume of the parallelepiped formed by the vectors U, V, and W is 20 units cubed.

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The choice where y is a nonlinear function of x is option C: x y x + = −.

In this equation, the relationship between x and y is not a simple direct proportion or linear function. The presence of the exponent on x indicates a nonlinear relationship.

As x increases or decreases, the effect on y is not constant or proportional. Instead, it involves a more complex operation, in this case, the squaring of x and then subtracting it. This results in a curved relationship between x and y, which is characteristic of a nonlinear function.

Nonlinear functions can have various shapes and patterns, including curves, exponential growth or decay, or periodic behavior.

These functions do not exhibit a constant rate of change and cannot be represented by a straight line on a graph.

In contrast, linear functions have a constant rate of change and can be represented by a straight line.

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The approximate value of the given integral, using the generalized trapezoidal rule (step h=1), is 11.25180209.

The integral is ∫[4,1]√(x²+3x) dx.

Using the generalized trapezoidal rule (step h=1), we need to find the approximate value of this integral. Firstly, we have to compute the value of f(x) at the end points.

Using x = 4, we get

f(4) = √(4² + 3(4))

= √28

Using x = 1, we get

f(1) = √(1² + 3(1))

= √4

= 2

The general formula for the trapezoidal rule is,

∫[a,b]f(x) dx = (h/2) * [f(a) + 2*Σ(i=1,n-1)f(xi) + f(b)], where h = (b-a)/n is the step size, and n is the number of intervals.

So, we can write the formula for the generalized trapezoidal rule as follows,

∫[a,b]f(x) dx ≈ h * [1/2*f(a) + Σ(i=1,n-1)f(xi) + 1/2*f(b)]

Now, we need to find the value of the integral using the given formula with n = 3.

Since the step size is

h = (4-1)/3

h = 1,

we get,

= ∫[4,1]√(x²+3x) dx

≈ 1/2 * [√28 + 2(√16 + √13) + 2]

≈ 1/2 * [5.29150262 + 2(4 + 3.60555128) + 2]

≈ 1/2 * [5.29150262 + 14.21110255 + 2]

≈ 11.25180209

Thus, the approximate value of the given integral, using the generalized trapezoidal rule (step h=1), is 11.25180209. Therefore, the generalized trapezoidal rule is useful for approximating definite integrals with variable functions. However, we need to choose an appropriate step size to ensure accuracy. The trapezoidal rule is a simple and easy-to-use method for approximating definite integrals, but it may not be very accurate for highly curved functions.

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To find the inverse Laplace transform of the given functions, we need to decompose them into partial fractions and then use known Laplace transform formulas. Let's go through each function step by step.

F(s) = (4s + 32)/(s^2 - 16)

First, we need to factor the denominator:

s^2 - 16 = (s + 4)(s - 4)

We can express F(s) as:

F(s) = A/(s + 4) + B/(s - 4)

To find the values of A and B, we multiply both sides by the denominator:

4s + 32 = A(s - 4) + B(s + 4)

Expanding and equating coefficients, we have:

4s + 32 = (A + B)s + (-4A + 4B)

Equating the coefficients of s, we get:

4 = A + B

Equating the constant terms, we get:

32 = -4A + 4B

Solving this system of equations, we find:

A = 6

B = -2

Now, substituting these values back into F(s), we have:

F(s) = 6/(s + 4) - 2/(s - 4)

Taking the inverse Laplace transform, we can find f(t):

f(t) = 6e^(-4t) - 2e^(4t)

F(s) = (2s + 1)/(s^2 - 16)

Again, we need to factor the denominator:

s^2 - 16 = (s + 4)(s - 4)

We can express F(s) as:

F(s) = A/(s + 4) + B/(s - 4)

To find the values of A and B, we multiply both sides by the denominator:

2s + 1 = A(s - 4) + B(s + 4)

Expanding and equating coefficients, we have:

2s + 1 = (A + B)s + (-4A + 4B)

Equating the coefficients of s, we get:

2 = A + B

Equating the constant terms, we get:

1 = -4A + 4B

Solving this system of equations, we find:

A = -1/4

B = 9/4

Now, substituting these values back into F(s), we have:

F(s) = -1/(4(s + 4)) + 9/(4(s - 4))

Taking the inverse Laplace transform, we can find f(t):

f(t) = (-1/4)e^(-4t) + (9/4)e^(4t)

F(s) = (s + a)/(s^2 - s - 2)

We can express F(s) as:

F(s) = A/(s - 1) + B/(s + 2)

To find the values of A and B, we multiply both sides by the denominator:

s + a = A(s + 2) + B(s - 1)

Expanding and equating coefficients, we have:

s + a = (A + B)s + (2A - B)

Equating the coefficients of s, we get:

1 = A + B

Equating the constant terms, we get:

a = 2A - B

Solving this system of equations, we find:

A = (a + 1)/3

B = (2 - a)/3

Now, substituting these values back into F(s), we have:

F(s) = (a + 1)/(3(s - 1)) + (2 - a)/(3(s + 2))

Taking the inverse Laplace transform, we can find f(t):

f(t) = [(a + 1)/3]e^t + [(2 - a)/3]e^(-2t)

F(s) = s/(s^2 + 10s + 2)

We can express F(s) as:

F(s) = A/(s + a) + B/(s + b)

To find the values of A and B, we multiply both sides by the denominator:

s = A(s + b) + B(s + a)

Expanding and equating coefficients, we have:

s = (A + B)s + (aA + bB)

Equating the coefficients of s, we get:

1 = A + B

Equating the constant terms, we get:

0 = aA + bB

Solving this system of equations, we find:

A = -b/(a - b)

B = a/(a - b)

Now, substituting these values back into F(s), we have:

F(s) = -b/(a - b)/(s + a) + a/(a - b)/(s + b)

Taking the inverse Laplace transform, we can find f(t):

f(t) = [-b/(a - b)]e^(-at) + [a/(a - b)]e^(-bt)

These are the inverse Laplace transforms of the given functions.

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A 3-regular simple connected graph with faces of degree 4 and 6 has exactly 6 squares.


Let F4 and F6 be the numbers of squares and hexagons, respectively, in the graph. According to Euler's formula, V - E + F = 2, where V, E, and F are the numbers of vertices, edges, and faces in the graph, respectively. Since each square has 4 edges and each hexagon has 6 edges, the number of edges can be expressed as 4F4 + 6F6.
Since the graph is 3-regular, each vertex is incident to 3 edges. Hence, the number of edges is also equal to 3V/2.  

By comparing these two expressions for the number of edges and using Euler's formula, we obtain 3V/2 = 4F4 + 6F6 + 6. Since V, F4, and F6 are all integers, it follows that 4F4 + 6F6 + 6 is even. Therefore, F4 is even.
Since each square has two hexagons as neighbors, each hexagon has two squares as neighbors, and the graph is connected, it follows that F4 = 2F6. Hence, F4 is a multiple of 4 and therefore must be at least 4. Therefore, the graph contains at least 2 squares.

Suppose that the graph contains k squares, where k is greater than or equal to 2. Then the total number of faces is 2k + (6k/2) = 5k, and the total number of edges is 3V/2 = 6k + 6.

By Euler's formula, we have V - (6k + 6) + 5k = 2, which implies that V = k + 4. But each vertex has degree 3, so the number of vertices must be a multiple of 3. Therefore, k must be a multiple of 3.
Since F4 = 2F6, it follows that k is even. Hence, the possible values of k are 2, 4, 6, ..., and the corresponding values of F4 are 4, 8, 12, ....

Since the graph is connected, it cannot contain more than k hexagons. Therefore, the maximum possible value of k is F6, which is equal to (3V - 12)/4.
Hence, k is at most (3V - 12)/8. Since k is even and at least 2, it follows that k is at most 6. Therefore, the graph contains exactly 6 squares.

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the cost function is C(x) = 13x + 30,800 dollars and the revenue function is R(x) = (1,572 − 23x)x dollars. The break-even points are x = 800 and x = 1,200 units. The vertex of the revenue function is (34, 44,776) dollars, representing the maximum revenue. The profit function, P(x), is obtained by subtracting the cost function from the revenue function. The vertex of the profit function is (34, 11,976) dollars, indicating the maximum profit. The price that maximizes the profit is $1,210.

To calculate the cost function, we consider the fixed costs of $30,800 and the variable cost per unit of 13x + 444 dollars. The cost function is given by C(x) = 13x + 30,800, where x is the total number of units produced.

The revenue function is determined by the selling price of the product, which is 1,572 − 23x dollars per unit, multiplied by the number of units x. Thus, the revenue function is R(x) = (1,572 − 23x)x.

The break-even points occur when the revenue equals the cost. By setting R(x) = C(x), we can solve for x to find the break-even points. In this case, the break-even points are x = 800 and x = 1,200 units.

The vertex of the revenue function can be found by using the formula x = -b/(2a), where a and b are the coefficients of the quadratic equation. Plugging in the values, we find that the vertex is located at (34, 44,776) dollars.

The profit function is calculated by subtracting the cost function from the revenue function: P(x) = R(x) - C(x). By finding the vertex of the profit function using the same method as above, we get (34, 11,976) dollars as the maximum profit.

To determine the price that maximizes the profit, we evaluate the revenue function at the x-coordinate of the profit function's vertex. Substituting x = 34 into the revenue function, we find that the price maximizing the profit is $1,210.

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The Laplace transform of y is defined as follows:y(s) = L[y(t)] = ∫[0]^[∞] y(t)e^(-st)dt Where "s" is the Laplace transform variable and "t" is the time variable.

For the given IVP:y" - 6y' + 9y - t²e³t, y(0) = -2, y'(0) = -6

We need to solve for y(s), i.e., the Laplace transform of y.

Therefore, applying the Laplace transform to both sides of the given differential equation, we get:

L[y" - 6y' + 9y] = L[t²e³t]

Given the differential equation y" - 6y' + 9y - t²e³t and the initial conditions, we are required to solve for y(s), which is the Laplace transform of y(t). Applying the Laplace transform to both sides of the differential equation and using the properties of Laplace transform, we get

[s²Y(s) - sy(0) - y'(0)] - 6[sY(s) - y(0)] + 9Y(s) = 2/s^4 - 3/(s-3)³ = [2/(3!)s³ - 3!/2!/(s-3)² + 3!/1!(s-3) - 3/(s-3)³].

Substituting the given initial conditions, we get

[s²Y(s) + 2s + 4] - 6[sY(s) + 2] + 9Y(s) = [2/(3!)s³ - 3!/2!/(s-3)² + 3!/1!(s-3) - 3/(s-3)³].

Simplifying the above equation, we get

(s-3)³Y(s) = 2/(3!)s³ - 3!/2!/(s-3)² + 3!/1!(s-3) - 3/(s-3)³ + 6(s-1)/(s-3)².

Therefore, Y(s) = {2/(3!)(s-3)⁴ - 3!/2!(s-3)³ + 3!/1!(s-3)² - 3/(s-3)⁴ + 6(s-1)/(s-3)⁵}/{(s-3)³}.

Hence, we have solved for y(s), the Laplace transform of y.

Therefore, the solution for Y, the Laplace transform of y, for the given IVP y" - 6y' + 9y - t²e³t, y(0) = -2, y'(0) = -6 is

Y(s) = {2/(3!)(s-3)⁴ - 3!/2!(s-3)³ + 3!/1!(s-3)² - 3/(s-3)⁴ + 6(s-1)/(s-3)⁵}/{(s-3)³}.

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