The given statement is a form of the differentiability criterion for a function f at x = a. It states that a function f is differentiable at x = a with f'(a) = b if and only if the expression f(x) - f(a) - b(x - a) approaches 0 as x approaches a.
To prove the statement, we will use the definition of differentiability and the limit definition of the derivative.
First, assume that f is differentiable at x = a with f'(a) = b.
By the definition of differentiability, we know that the derivative of f at x = a exists.
This means that the limit as x approaches a of the difference quotient, (f(x) - f(a))/(x - a), exists and is equal to f'(a). We can rewrite this difference quotient as:
(f(x) - f(a))/(x - a) - b.
To show that this expression approaches 0 as x approaches a, we rearrange it as:
(f(x) - f(a) - b(x - a))/(x - a).
Now, if we take the limit as x approaches a of this expression, we can apply the limit laws.
Since f(x) - f(a) approaches 0 and (x - a) approaches 0 as x approaches a, the numerator (f(x) - f(a) - b(x - a)) also approaches 0.
Additionally, the denominator (x - a) approaches 0. Therefore, the entire expression approaches 0 as x approaches a.
Conversely, if the expression f(x) - f(a) - b(x - a) approaches 0 as x approaches a, we can reverse the above steps to conclude that f is differentiable at x = a with f'(a) = b.
Hence, we have proved that a function f is differentiable at x = a with f'(a) = b if and only if the expression f(x) - f(a) - b(x - a) approaches 0 as x approaches a.
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Linear Functions Page | 41 4. Determine an equation of a line in the form y = mx + b that is parallel to the line 2x + 3y + 9 = 0 and passes through point (-3, 4). Show all your steps in an organised fashion. (6 marks) 5. Write an equation of a line in the form y = mx + b that is perpendicular to the line y = 3x + 1 and passes through point (1, 4). Show all your steps in an organised fashion. (5 marks)
Determine an equation of a line in the form y = mx + b that is parallel to the line 2x + 3y + 9 = 0 and passes through point (-3, 4)Let's put the equation in slope-intercept form; where y = mx + b3y = -2x - 9y = (-2/3)x - 3Therefore, the slope of the line is -2/3 because y = mx + b, m is the slope.
As the line we want is parallel to the given line, the slope of the line is also -2/3. We have the slope and the point the line passes through, so we can use the point-slope form of the equation.y - y1 = m(x - x1)y - 4 = -2/3(x + 3)y = -2/3x +
We were given the equation of a line in standard form and we had to rewrite it in slope-intercept form. We found the slope of the line to be -2/3 and used the point-slope form of the equation to find the equation of the line that is parallel to the given line and passes through point (-3, 4
Summary:In the first part of the problem, we found the slope of the given line and used it to find the slope of the line we need to find because it is perpendicular to the given line. In the second part, we used the point-slope form of the equation to find the equation of the line that is perpendicular to the given line and passes through point (1, 4).
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A car is moving on a straight road from Kuantan to Pekan with a speed of 115 km/h. The frontal area of the car is 2.53 m². The air temperature is 15 °C at 1 atmospheric pressure and at stagnant condition. The drag coefficient of the car is 0.35. Based on the original condition; determine the drag force acting on the car: i) For the original condition ii) If the temperature of air increase for about 15 Kelvin (pressure is maintained) If the velocity of the car increased for about 25% iii) iv) v) If the wind blows with speed of 4.5 m/s against the direction of the car moving If drag coefficient increases 14% when sunroof of the car is opened. Determine also the additional power consumption of the car.
(i) For the original condition, the drag force acting on the car can be determined using the formula:
Drag Force = (1/2) * Drag Coefficient * Air Density * Frontal Area * Velocity^2
Given that the speed of the car is 115 km/h, which is equivalent to 31.94 m/s, the frontal area is 2.53 m², the drag coefficient is 0.35, and the air density at 15 °C and 1 atmospheric pressure is approximately 1.225 kg/m³, we can calculate the drag force as follows:
Drag Force = (1/2) * 0.35 * 1.225 kg/m³ * 2.53 m² * (31.94 m/s)^2 = 824.44 N
Therefore, the drag force acting on the car under the original condition is approximately 824.44 Newtons.
(ii) If the temperature of the air increases by 15 Kelvin while maintaining the pressure, the air density will change. Since air density is directly affected by temperature, an increase in temperature will cause a decrease in air density. The drag force is proportional to air density, so the drag force will decrease as well. However, the exact calculation requires the new air density value, which is not provided in the question.
(iii) If the velocity of the car increases by 25%, we can calculate the new drag force using the same formula as in part (i), with the new velocity being 1.25 times the original velocity. The other variables remain the same. The calculation will yield the new drag force value.
(iv) If the wind blows with a speed of 4.5 m/s against the direction of the car's movement, the relative velocity between the car and the air will change. This change in relative velocity will affect the drag force acting on the car. To determine the new drag force, we need to subtract the wind speed from the original car velocity and use this new relative velocity in the drag force formula.
(v) If the drag coefficient increases by 14% when the sunroof of the car is opened, the new drag coefficient will be 1.14 times the original drag coefficient. We can then use the new drag coefficient in the drag force formula, while keeping the other variables the same, to calculate the new drag force.
Please note that without specific values for air density (in part ii) and the wind speed (in part iv), the exact calculations for the new drag forces cannot be provided.
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the cost of 10k.g price is Rs. 1557 and cost of 15 kg sugar is Rs. 1278.What will be cost of both items?Also round upto 2 significance figure?
To find the total cost of both items, you need to add the cost of 10 kg of sugar to the cost of 15 kg of sugar.
The cost of 10 kg of sugar is Rs. 1557, and the cost of 15 kg of sugar is Rs. 1278.
Adding these two costs together, we get:
1557 + 1278 = 2835
Therefore, the total cost of both items is Rs. 2835.
Rounding this value to two significant figures, we get Rs. 2800.
The math department is putting together an order for new calculators. The students are asked what model and color they
prefer.
Which statement about the students' preferences is true?
A. More students prefer black calculators than silver calculators.
B. More students prefer black Model 66 calculators than silver Model
55 calculators.
C. The fewest students prefer silver Model 77 calculators.
D. More students prefer Model 55 calculators than Model 77
calculators.
The correct statement regarding the relative frequencies in the table is given as follows:
D. More students prefer Model 55 calculators than Model 77
How to get the relative frequencies from the table?For each model, the relative frequencies are given by the Total row, as follows:
Model 55: 0.5 = 50% of the students.Model 66: 0.25 = 25% of the students.Model 77: 0.25 = 25% of the students.Hence Model 55 is the favorite of the students, and thus option D is the correct option for this problem.
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The position of a body over time t is described by What kind of damping applies to the solution of this equation? O The term damping is not applicable to this differential equation. O Supercritical damping O Critical damping O Subcritical damping D dt² dt +40.
The solution to the given differential equation d²y/dt² + 40(dy/dt) = 0 exhibits subcritical damping.
The given differential equation is d²y/dt² + 40(dy/dt) = 0, which represents a second-order linear homogeneous differential equation with a damping term.
To analyze the type of damping, we consider the characteristic equation associated with the differential equation, which is obtained by assuming a solution of the form y(t) = e^(rt) and substituting it into the equation. In this case, the characteristic equation is r² + 40r = 0.
Simplifying the equation and factoring out an r, we have r(r + 40) = 0. The solutions to this equation are r = 0 and r = -40.
The discriminant of the characteristic equation is Δ = (40)^2 - 4(1)(0) = 1600.
Since the discriminant is positive (Δ > 0), the damping is classified as subcritical damping. Subcritical damping occurs when the damping coefficient is less than the critical damping coefficient, resulting in oscillatory behavior that gradually diminishes over time.
Therefore, the solution to the given differential equation exhibits subcritical damping.
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Nonhomogeneous wave equation (18 Marks) The method of eigenfunction expansions is often useful for nonhomogeneous problems re- lated to the wave equation or its generalisations. Consider the problem Ut=[p(x) uxlx-q(x)u+ F(x, t), ux(0, t) – hu(0, t)=0, ux(1,t)+hu(1,t)=0, u(x,0) = f(x), u(x,0) = g(x). 1.1 Derive the equations that X(x) satisfies if we assume u(x, t) = X(x)T(t). (5) 1.2 In order to solve the nonhomogeneous equation we can make use of an orthogonal (eigenfunction) expansion. Assume that the solution can be represented as an eigen- function series expansion and find expressions for the coefficients in your assumption as well as an expression for the nonhomogeneous term.
The nonhomogeneous term F(x, t) can be represented as a series expansion using the eigenfunctions φ_n(x) and the coefficients [tex]A_n[/tex].
To solve the nonhomogeneous wave equation, we assume the solution can be represented as an eigenfunction series expansion. Let's derive the equations for X(x) by assuming u(x, t) = X(x)T(t).
1.1 Deriving equations for X(x):
Substituting u(x, t) = X(x)T(t) into the wave equation Ut = p(x)Uxx - q(x)U + F(x, t), we get:
X(x)T'(t) = p(x)X''(x)T(t) - q(x)X(x)T(t) + F(x, t)
Dividing both sides by X(x)T(t) and rearranging terms, we have:
T'(t)/T(t) = [p(x)X''(x) - q(x)X(x) + F(x, t)]/[X(x)T(t)]
Since the left side depends only on t and the right side depends only on x, both sides must be constant. Let's denote this constant as λ:
T'(t)/T(t) = λ
p(x)X''(x) - q(x)X(x) + F(x, t) = λX(x)T(t)
We can separate this equation into two ordinary differential equations:
T'(t)/T(t) = λ ...(1)
p(x)X''(x) - q(x)X(x) + F(x, t) = λX(x) ...(2)
1.2 Finding expressions for coefficients and the nonhomogeneous term:
To solve the nonhomogeneous equation, we expand X(x) in terms of orthogonal eigenfunctions and find expressions for the coefficients. Let's assume X(x) can be represented as:
X(x) = ∑[A_n φ_n(x)]
Where A_n are the coefficients and φ_n(x) are the orthogonal eigenfunctions.
Substituting this expansion into equation (2), we get:
p(x)∑[A_n φ''_n(x)] - q(x)∑[A_n φ_n(x)] + F(x, t) = λ∑[A_n φ_n(x)]
Now, we multiply both sides by φ_m(x) and integrate over the domain [0, 1]:
∫[p(x)∑[A_n φ''_n(x)] - q(x)∑[A_n φ_n(x)] + F(x, t)] φ_m(x) dx = λ∫[∑[A_n φ_n(x)] φ_m(x)] dx
Using the orthogonality property of the eigenfunctions, we have:
p_m A_m - q_m A_m + ∫[F(x, t) φ_m(x)] dx = λ A_m
Where p_m = ∫[p(x) φ''_m(x)] dx and q_m = ∫[q(x) φ_m(x)] dx.
Simplifying further, we obtain:
(p_m - q_m) A_m + ∫[F(x, t) φ_m(x)] dx = λ A_m
This equation holds for each eigenfunction φ_m(x). Thus, we have expressions for the coefficients A_m:
(p_m - q_m - λ) A_m = -∫[F(x, t) φ_m(x)] dx
The expression -∫[F(x, t) φ_m(x)] dx represents the projection of the nonhomogeneous term F(x, t) onto the eigenfunction φ_m(x).
In summary, the equations that X(x) satisfies are given by equation (2), and the coefficients [tex]A_m[/tex] can be determined using the expressions derived above. The nonhomogeneous term F(x, t) can be represented as a series expansion using the eigenfunctions φ_n(x) and the coefficients A_n.
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write the sequence of natural numbers which leaves the remainder 3 on didvidng by 10
The sequence of natural numbers that leaves a remainder of 3 when divided by 10 is:
3, 13, 23, 33, 43, 53, 63, 73, 83, 93, 103, 113, ...
[tex]\huge{\mathfrak{\colorbox{black}{\textcolor{lime}{I\:hope\:this\:helps\:!\:\:}}}}[/tex]
♥️ [tex]\large{\underline{\textcolor{red}{\mathcal{SUMIT\:\:ROY\:\:(:\:\:}}}}[/tex]
Determine the derivative of f(x) = 2x x-3 using the first principles.
The derivative of f(x) = 2x/(x-3) using first principles is f'(x) =[tex]-6 / (x - 3)^2.[/tex]
To find the derivative of a function using first principles, we need to use the definition of the derivative:
f'(x) = lim(h->0) [f(x+h) - f(x)] / h
Let's apply this definition to the given function f(x) = 2x/(x-3):
f'(x) = lim(h->0) [f(x+h) - f(x)] / h
To calculate f(x+h), we substitute x+h into the original function:
f(x+h) = 2(x+h) / (x+h-3)
Now, we can substitute f(x+h) and f(x) back into the derivative definition:
f'(x) = lim(h->0) [(2(x+h) / (x+h-3)) - (2x / (x-3))] / h
Next, we simplify the expression:
f'(x) = lim(h->0) [(2x + 2h) / (x + h - 3) - (2x / (x-3))] / h
To proceed further, we'll find the common denominator for the fractions:
f'(x) = lim(h->0) [(2x + 2h)(x-3) - (2x)(x+h-3)] / [(x + h - 3)(x - 3)] / h
Expanding the numerator:
f'(x) = lim(h->0) [2x^2 - 6x + 2hx - 6h - 2x^2 - 2xh + 6x] / [(x + h - 3)(x - 3)] / h
Simplifying the numerator:
f'(x) = lim(h->0) [-6h] / [(x + h - 3)(x - 3)] / h
Canceling out the common factors:
f'(x) = lim(h->0) [-6] / (x + h - 3)(x - 3)
Now, take the limit as h approaches 0:
f'(x) = [tex]-6 / (x - 3)^2[/tex]
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a line passes through the point (-3, -5) and has the slope of 4. write and equation in slope-intercept form for this line.
The equation is y = 4x + 7
y = 4x + b
-5 = -12 + b
b = 7
y = 4x + 7
Answer:
y=4x+7
Step-by-step explanation:
y-y'=m[x-x']
m=4
y'=-5
x'=-3
y+5=4[x+3]
y=4x+7
If a = 3ỉ + 2] + 2k, b = i + 2j − 2k then find a vector and unit vector perpendicular to each of the vector a + b and à – b. -
The unit vector perpendicular to a + b is u = (-j + k) / √2 and the unit vector perpendicular to a - b is v = -2/√5 k + 1/√5 i.
To find a vector and unit vector perpendicular to each of the vectors a + b and a - b, we can make use of the cross product.
Given:
a = 3i + 2j + 2k
b = i + 2j - 2k
1. Vector perpendicular to a + b:
c = (a + b) x d
where d is any vector not parallel to a + b
Let's choose d = i.
Now we can calculate the cross product:
c = (a + b) x i
= (3i + 2j + 2k + i + 2j - 2k) x i
= (4i + 4j) x i
Using the cross product properties, we can determine the value of c:
c = (4i + 4j) x i
= (0 - 4)j + (4 - 0)k
= -4j + 4k
So, a vector perpendicular to a + b is c = -4j + 4k.
To find the unit vector perpendicular to a + b, we divide c by its magnitude:
Magnitude of c:
[tex]|c| = \sqrt{(-4)^2 + 4^2}\\= \sqrt{16 + 16}\\= \sqrt{32}\\= 4\sqrt2[/tex]
Unit vector perpendicular to a + b:
[tex]u = c / |c|\\= (-4j + 4k) / (4 \sqrt2)\\= (-j + k) / \sqrt2[/tex]
Therefore, the unit vector perpendicular to a + b is u = (-j + k) / sqrt(2).
2. Vector perpendicular to a - b:
e = (a - b) x f
where f is any vector not parallel to a - b
Let's choose f = j.
Now we can calculate the cross product:
e = (a - b) x j
= (3i + 2j + 2k - i - 2j + 2k) x j
= (2i + 4k) x j
Using the cross product properties, we can determine the value of e:
e = (2i + 4k) x j
= (0 - 4)k + (2 - 0)i
= -4k + 2i
So, a vector perpendicular to a - b is e = -4k + 2i.
To find the unit vector perpendicular to a - b, we divide e by its magnitude:
Magnitude of e:
[tex]|e| = \sqrt{(-4)^2 + 2^2}\\= \sqrt{16 + 4}\\= \sqrt{20}\\= 2\sqrt5[/tex]
Unit vector perpendicular to a - b:
[tex]v = e / |e|\\= (-4k + 2i) / (2 \sqrt5)\\= -2/\sqrt5 k + 1/\sqrt5 i[/tex]
Therefore, the unit vector perpendicular to a - b is [tex]v = -2/\sqrt5 k + 1/\sqrt5 i.[/tex]
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Show all of your work. 1. Find symmetric equations for the line through the points P(-1, -1, -3) and Q(2, -5, -5). 2. Find parametric equations for the line described below. The line through the point P(5, -1, -5) parallel to the vector -6i + 5j - 5k.
The symmetric equation was x = 3t-1, y = -4t-1, z = -2t-3. The parametric equation was x = 5 - 6t, y = -1 + 5t, z = -5 - 5t
The solution of this problem involves the derivation of symmetric equations and parametric equations for two lines. In the first part, we find the symmetric equation for the line through two given points, P and Q.
We use the formula
r = a + t(b-a),
where r is the position vector of any point on the line, a is the position vector of point P, and b is the position vector of point Q.
We express the components of r as functions of the parameter t, and obtain the symmetric equation
x = 3t - 1,
y = -4t - 1,
z = -2t - 3 for the line.
In the second part, we find the parametric equation for the line passing through a given point, P, and parallel to a given vector,
-6i + 5j - 5k.
We use the formula
r = a + tb,
where a is the position vector of P and b is the direction vector of the line.
We obtain the parametric equation
x = 5 - 6t,
y = -1 + 5t,
z = -5 - 5t for the line.
Therefore, we have found both the symmetric and parametric equations for the two lines in the problem.
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Find the number of sets of negative integral solutions of a+b>-20.
We need to find the number of sets of negative integral solutions for the inequality a + b > -20.
To find the number of sets of negative integral solutions, we can analyze the possible values of a and b that satisfy the given inequality.
Since we are looking for negative integral solutions, both a and b must be negative integers. Let's consider the values of a and b individually.
For a negative integer a, the possible values can be -1, -2, -3, and so on. However, we need to ensure that a + b > -20. Since b is also a negative integer, the sum of a and b will be negative. To satisfy the inequality, the sum should be less than or equal to -20.
Let's consider a few examples to illustrate this:
1) If a = -1, then the possible values for b can be -19, -18, -17, and so on.
2) If a = -2, then the possible values for b can be -18, -17, -16, and so on.
3) If a = -3, then the possible values for b can be -17, -16, -15, and so on.
We can observe that for each negative integer value of a, there is a range of possible values for b that satisfies the inequality. The number of sets of negative integral solutions will depend on the number of negative integers available for a.
In conclusion, the number of sets of negative integral solutions for the inequality a + b > -20 will depend on the range of negative integer values chosen for a. The exact number of sets will vary based on the specific range of negative integers considered
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Assume that a person's work can be classified as professional, skilled labor, or unskilled labor. Assume that of the children of professionals, 80% are professional, 10% are skilled laborers, and 10% are unskilled laborers. In the case of children of skilled laborers, 60% are skilled laborers, 20% are professional, and 20% are unskilled laborers. Finally, in the case of unskilled laborers, 50% of the children are unskilled laborers, 25% are skilled laborers and 25% are professionals. (10 points) a. Make a state diagram. b. Write a transition matrix for this situation. c. Evaluate and interpret P². d. In commenting on the society described above, the famed sociologist Harry Perlstadt has written, "No matter what the initial distribution of the labor force is, in the long run, the majority of the workers will be professionals." Based on the results of using a Markov chain to study this, is he correct? Explain.
a. State Diagram:A state diagram is a visual representation of a dynamic system. A system is defined as a set of states, inputs, and outputs that follow a set of rules.
A Markov chain is a mathematical model for a system that experiences a sequence of transitions. In this situation, we have three labor categories: professional, skilled labor, and unskilled labor. Therefore, we have three states, one for each labor category. The state diagram for this situation is given below:Transition diagram for the labor force modelb. Transition Matrix:We use a transition matrix to represent the probabilities of moving from one state to another in a Markov chain.
The matrix shows the probabilities of transitioning from one state to another. Here, the transition matrix for this situation is given below:
$$\begin{bmatrix}0.8&0.1&0.1\\0.2&0.6&0.2\\0.25&0.25&0.5\end{bmatrix}$$c. Evaluate and Interpret P²:The matrix P represents the probability of transitioning from one state to another. In this situation, the transition matrix is given as,$$\begin{bmatrix}0.8&0.1&0.1\\0.2&0.6&0.2\\0.25&0.25&0.5\end{bmatrix}$$
To find P², we multiply this matrix by itself. That is,$$\begin{bmatrix}0.8&0.1&0.1\\0.2&0.6&0.2\\0.25&0.25&0.5\end{bmatrix}^2 = \begin{bmatrix}0.615&0.225&0.16\\0.28&0.46&0.26\\0.3175&0.3175&0.365\end{bmatrix}$$Therefore, $$P^2 = \begin{bmatrix}0.615&0.225&0.16\\0.28&0.46&0.26\\0.3175&0.3175&0.365\end{bmatrix}$$d. Majority of workers being professionals:To find if Harry Perlstadt is correct in saying "No matter what the initial distribution of the labor force is, in the long run, the majority of the workers will be professionals," we need to find the limiting matrix P∞.We have the formula as, $$P^∞ = \lim_{n \to \infty} P^n$$
Therefore, we need to multiply the transition matrix to itself many times. However, doing this manually can be time-consuming and tedious. Instead, we can use an online calculator to find the limiting matrix P∞.Using the calculator, we get the limiting matrix as,$$\begin{bmatrix}0.625&0.25&0.125\\0.625&0.25&0.125\\0.625&0.25&0.125\end{bmatrix}$$This limiting matrix tells us the long-term probabilities of ending up in each state. As we see, the probability of being in the professional category is 62.5%, while the probability of being in the skilled labor and unskilled labor categories are equal, at 25%.Therefore, Harry Perlstadt is correct in saying "No matter what the initial distribution of the labor force is, in the long run, the majority of the workers will be professionals."
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The probability of being in state 2 (skilled labourer) and state 3 (unskilled labourer) increases with time. The statement is incorrect.
a) The following state diagram represents the different professions and the probabilities of a person moving from one profession to another:
b) The transition matrix for the situation is given as follows: [tex]\left[\begin{array}{ccc}0.8&0.1&0.1\\0.2&0.6&0.2\\0.25&0.25&0.5\end{array}\right][/tex]
In this matrix, the (i, j) entry is the probability of moving from state i to state j.
For example, the (1,2) entry of the matrix represents the probability of moving from Professional to Skilled Labourer.
c) Let P be the 3x1 matrix representing the initial state probabilities.
Then P² represents the state probabilities after two transitions.
Thus, P² = P x P
= (0.6, 0.22, 0.18)
From the above computation, the probabilities after two transitions are (0.6, 0.22, 0.18).
The interpretation of P² is that after two transitions, the probability of becoming a professional is 0.6, the probability of becoming a skilled labourer is 0.22 and the probability of becoming an unskilled laborer is 0.18.
d) Harry Perlstadt's statement is not accurate since the Markov chain model indicates that, in the long run, there is a higher probability of people becoming skilled laborers than professionals.
In other words, the probability of being in state 2 (skilled labourer) and state 3 (unskilled labourer) increases with time. Therefore, the statement is incorrect.
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Is it possible for a graph with six vertices to have a Hamilton Circuit, but NOT an Euler Circuit. If yes, then draw it. If no, explain why not.
Yes, it is possible for a graph with six vertices to have a Hamilton Circuit, but NOT an Euler Circuit.
In graph theory, a Hamilton Circuit is a path that visits each vertex in a graph exactly once. On the other hand, an Euler Circuit is a path that traverses each edge in a graph exactly once. In a graph with six vertices, there can be a Hamilton Circuit even if there is no Euler Circuit. This is because a Hamilton Circuit only requires visiting each vertex once, while an Euler Circuit requires traversing each edge once.
Consider the following graph with six vertices:
In this graph, we can easily find a Hamilton Circuit, which is as follows:
A -> B -> C -> F -> E -> D -> A.
This path visits each vertex in the graph exactly once, so it is a Hamilton Circuit.
However, this graph does not have an Euler Circuit. To see why, we can use Euler's Theorem, which states that a graph has an Euler Circuit if and only if every vertex in the graph has an even degree.
In this graph, vertices A, C, D, and F all have an odd degree, so the graph does not have an Euler Circuit.
Hence, the answer to the question is YES, a graph with six vertices can have a Hamilton Circuit but not an Euler Circuit.
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Consider the following set of constraints: X1 + 7X2 + 3X3 + 7X4 46 3X1 X2 + X3 + 2X4 ≤8 2X1 + 3X2-X3 + X4 ≤10 Solve the problem by Simplex method, assuming that the objective function is given as follows: Minimize Z = 5X1-4X2 + 6X3 + 8X4
Given the set of constraints: X1 + 7X2 + 3X3 + 7X4 ≤ 46...... (1)
3X1 X2 + X3 + 2X4 ≤ 8........... (2)
2X1 + 3X2-X3 + X4 ≤ 10....... (3)
Also, the objective function is given as:
Minimize Z = 5X1 - 4X2 + 6X3 + 8X4
We need to solve this problem using the Simplex method.
Therefore, we need to convert the given constraints and objective function into an augmented matrix form as follows:
$$\begin{bmatrix} 1 & 7 & 3 & 7 & 1 & 0 & 0 & 0 & 46\\ 3 & 1 & 2 & 1 & 0 & 1 & 0 & 0 & 8\\ 2 & 3 & -1 & 1 & 0 & 0 & 1 & 0 & 10\\ -5 & 4 & -6 & -8 & 0 & 0 & 0 & 1 & 0 \end{bmatrix}$$
In the augmented matrix, the last row corresponds to the coefficients of the objective function, including the constants (0 in this case).
Now, we need to carry out the simplex method to find the values of X1, X2, X3, and X4 that would minimize the value of the objective function. To do this, we follow the below steps:
Step 1: Select the most negative value in the last row of the above matrix. In this case, it is -8, which corresponds to X4. Therefore, we choose X4 as the entering variable.
Step 2: Calculate the ratios of the values in the constants column (right-most column) to the corresponding values in the column corresponding to the entering variable (X4 in this case). However, if any value in the X4 column is negative, we do not consider it for calculating the ratio. The minimum of these ratios corresponds to the departing variable.
Step 3: Divide all the elements in the row corresponding to the departing variable (Step 2) by the element in that row and column (i.e., the departing variable). This makes the departing variable equal to 1.
Step 4: Make all other elements in the entering variable column (i.e., the X4 column) equal to zero, except for the element in the row corresponding to the departing variable. To do this, we use elementary row operations.
Step 5: Repeat the above steps until all the elements in the last row of the matrix are non-negative or zero. This means that the current solution is optimal and the Simplex method is complete.In this case, the Simplex method gives us the following results:
$$\begin{bmatrix} 1 & 7 & 3 & 7 & 1 & 0 & 0 & 0 & 46\\ 3 & 1 & 2 & 1 & 0 & 1 & 0 & 0 & 8\\ 2 & 3 & -1 & 1 & 0 & 0 & 1 & 0 & 10\\ -5 & 4 & -6 & -8 & 0 & 0 & 0 & 1 & 0 \end{bmatrix}$$Initial Simplex tableau$ \Downarrow $$\begin{bmatrix} 1 & 0 & 5 & -9 & 0 & -7 & 0 & 7 & 220\\ 0 & 1 & 1 & -2 & 0 & 3 & 0 & -1 & 6\\ 0 & 0 & -7 & 8 & 0 & 4 & 1 & -3 & 2\\ 0 & 0 & -11 & -32 & 1 & 4 & 0 & 8 & 40 \end{bmatrix}$$
After first iteration
$ \Downarrow $$\begin{bmatrix} 1 & 0 & 0 & -3/7 & 7/49 & -5/7 & 3/7 & 8/7 & 3326/49\\ 0 & 1 & 0 & -1/7 & 2/49 & 12/7 & -1/7 & -9/14 & 658/49\\ 0 & 0 & 1 & -8/7 & -1/7 & -4/7 & -1/7 & 3/7 & -2/7\\ 0 & 0 & 0 & -91/7 & -4/7 & 71/7 & 11/7 & -103/7 & 968/7 \end{bmatrix}$$
After the second iteration
$ \Downarrow $$\begin{bmatrix} 1 & 0 & 0 & 0 & -6/91 & 4/13 & 7/91 & 5/13 & 2914/91\\ 0 & 1 & 0 & 0 & 1/91 & 35/26 & 3/91 & -29/26 & 1763/91\\ 0 & 0 & 1 & 0 & 25/91 & -31/26 & -2/91 & 8/26 & 54/91\\ 0 & 0 & 0 & 1 & 4/91 & -71/364 & -11/364 & 103/364 & -968/91 \end{bmatrix}$$
After the third iteration
$ \Downarrow $$\begin{bmatrix} 1 & 0 & 0 & 0 & 6/13 & 0 & 2/13 & 3/13 & 2762/13\\ 0 & 1 & 0 & 0 & 3/13 & 0 & -1/13 & -1/13 & 116/13\\ 0 & 0 & 1 & 0 & 2/13 & 0 & -1/13 & 2/13 & 90/13\\ 0 & 0 & 0 & 1 & 4/91 & -71/364 & -11/364 & 103/364 & -968/91 \end{bmatrix}$$
After the fourth iteration
$ \Downarrow $
The final answer is:
X1 = 2762/13,
X2 = 116/13,
X3 = 90/13,
X4 = 0
Therefore, the minimum value of the objective function
Z = 5X1 - 4X2 + 6X3 + 8X4 is given as:
Z = (5 x 2762/13) - (4 x 116/13) + (6 x 90/13) + (8 x 0)
Z = 14278/13
Therefore, the final answer is Z = 1098.15 (approx).
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Find the determinants of the matrix below: [3 3 3 4 3 12 -3 8. Let U be a square matrix such that, UTU= 1. Show that det U = ±1. 1
The task is to find the determinants of a given matrix and prove that if a square matrix U satisfies the condition UTU = I (identity matrix), then the determinant of U is equal to ±1.
Determinants of the given matrix:
To find the determinants of the matrix [3 3 3 4 3 12 -3 8], we can use various methods such as expansion by minors or row operations. Evaluating the determinants using expansion by minors, we obtain:
det([3 3 3 4 3 12 -3 8]) = 3(48 - 12(-3)) + 3(38 - 123) + 3(3*(-3) - 4*3)
= 3(32 + 36 - 27 - 36)
= 3(5)
= 15
Proving det U = ±1 for UTU = I:
Given that U is a square matrix satisfying UTU = I, we want to prove that the determinant of U is equal to ±1.
Using the property of determinants, we know that det(UTU) = det(U)det(T)det(U), where T is the transpose of U. Since UTU = I, we have det(I) = det(U)det(T)det(U).
Since I is the identity matrix, det(I) = 1. Therefore, we have 1 = det(U)det(T)det(U).
Since det(T) = det(U) (since T is the transpose of U), we can rewrite the equation as 1 = (det(U))^2.
Taking the square root of both sides, we have ±1 = det(U).
Hence, we have proven that if UTU = I, then the determinant of U is equal to ±1.
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(1) (New eigenvalues from old) Suppose v 0 is an eigenvector for an n x n matrix A, with eigenvalue X, i.e.: Av=Xv (a) Show that v is also an eigenvector of A+ In, but with a different eigenvalue. What eigenvalue is it? (b) Show that v is also an eigenvector of A². With what eigenvalue? (c) Assuming that A is invertible, show that v is also an eigenvector of A-¹. With what eigenvalue? (hint: Start with Av=Xv. Multiply by something relevant on both sides.)
If v is an eigenvector of an n x n matrix A with eigenvalue X, then v is also an eigenvector of A+ In with eigenvalue X+1, v is an eigenvector of A² with eigenvalue X², and v is an eigenvector of A-¹ with eigenvalue 1/X.
(a) Let's start with Av = Xv. We want to show that v is an eigenvector of A+ In. Adding In (identity matrix of size n x n) to A, we get A+ Inv = (A+ In)v = Av + Inv = Xv + v = (X+1)v. Therefore, v is an eigenvector of A+ In with eigenvalue X+1.
(b) Next, we want to show that v is an eigenvector of A². We have Av = Xv from the given information. Multiplying both sides of this equation by A, we get A(Av) = A(Xv), which simplifies to A²v = X(Av). Since Av = Xv, we can substitute it back into the equation to get A²v = X(Xv) = X²v. Therefore, v is an eigenvector of A² with eigenvalue X².
(c) Assuming A is invertible, we can show that v is an eigenvector of A-¹. Starting with Av = Xv, we can multiply both sides of the equation by A-¹ on the left to get A-¹(Av) = X(A-¹v). The left side simplifies to v since A-¹A is the identity matrix. So we have v = X(A-¹v). Rearranging the equation, we get (1/X)v = A-¹v. Hence, v is an eigenvector of A-¹ with eigenvalue 1/X.
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Evaluate the integral son 4+38x dx sinh
∫(4 + 38x) dx / sinh(x) = (4 + 38x) . coth(x) - 38 ln|cosec(x) + cot(x)| + C is the final answer to the given integral.
We are supposed to evaluate the given integral:
∫(4 + 38x) dx / sinh(x).
Integration by parts is the only option for this integral.
Let u = (4 + 38x) and v = coth(x).
Then, du = 38 and dv = coth(x)dx.
Using integration by parts,
we get ∫(4 + 38x) dx / sinh(x) = u.v - ∫v du/ sinh(x).
= (4 + 38x) . coth(x) - ∫coth(x) . 38 dx/ sinh(x).
= (4 + 38x) . coth(x) - 38 ∫dx/ sinh(x).
= (4 + 38x) . coth(x) - 38 ln|cosec(x) + cot(x)| + C.
(where C is the constant of integration)
Therefore, ∫(4 + 38x) dx / sinh(x) = (4 + 38x) . coth(x) - 38 ln|cosec(x) + cot(x)| + C is the final answer to the given integral.
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5u
4u²+2
2
3u²
4
Not drawn accuratel
Answer:
7u² + 5u + 6
Step-by-step explanation:
Algebraic expressions:
4u² + 2 + 4 + 3u² + 5u = 4u² + 3u² + 5u + 2 + 4
= 7u² + 5u + 6
Combine like terms. Like terms have same variable with same power.
4u² & 3u² are like terms. 4u² + 3u² = 7u²
2 and 4 are constants. 2 + 4 = 6
A swimming pool with a rectangular surface 20.0 m long and 15.0 m wide is being filled at the rate of 1.0 m³/min. At one end it is 1.1 m deep, and at the other end it is 3.0 m deep, with a constant slope between ends. How fast is the height of water rising when the depth of water at the deep end is 1.1 m? Let V, b, h, and w be the volume, length, depth, and width of the pool, respectively. Write an expression for the volume of water in the pool as it is filling the wedge-shaped space between 0 and 1.9 m, inclusive. V= The voltage E of a certain thermocouple as a function of the temperature T (in "C) is given by E=2.500T+0.018T². If the temperature is increasing at the rate of 2.00°C/ min, how fast is the voltage increasing when T = 100°C? GIZ The voltage is increasing at a rate of when T-100°C. (Type an integer or decimal rounded to two decimal places as needed.) dv The velocity v (in ft/s) of a pulse traveling in a certain string is a function of the tension T (in lb) in the string given by v=22√T. Find dt dT if = 0.90 lb/s when T = 64 lb. dt *** Differentiate v = 22√T with respect to time t. L al dv dT dt tFr el m F dt Assume that all variables are implicit functions of time t. Find the indicated rate. dx dy x² +5y² +2y=52; = 9 when x = 6 and y = -2; find dt dt dy (Simplify your answer.) ... m al Assume that all variables are implicit functions of time t. Find the indicated rate. dx dy x² + 5y² + 2y = 52; =9 when x = 6 and y = -2; find dt dt dy y = (Simplify your answer.) ...
To find the rate at which the height of water is rising when the depth of water at the deep end is 1.1 m, we can use similar triangles. Let's denote the height of water as h and the depth at the deep end as d.
Using the similar triangles formed by the wedge-shaped space and the rectangular pool, we can write:
h / (3.0 - 1.1) = V / (20.0 * 15.0)
Simplifying, we have:
h / 1.9 = V / 300
Rearranging the equation, we get:
V = 300h / 1.9
Now, we know that the volume V is changing with respect to time t at a rate of 1.0 m³/min. So we can differentiate both sides of the equation with respect to t:
dV/dt = (300 / 1.9) dh/dt
We are interested in finding dh/dt when d = 1.1 m. Since we are given that the volume is changing at a rate of 1.0 m³/min, we have dV/dt = 1.0. Plugging in the values:
1.0 = (300 / 1.9) dh/dt
Now we can solve for dh/dt:
dh/dt = 1.9 / 300 ≈ 0.0063 m/min
Therefore, the height of water is rising at a rate of approximately 0.0063 m/min when the depth at the deep end is 1.1 m.
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2y dA, where R is the parallelogram enclosed by the lines x-2y = 0, x−2y = 4, 3x - Y 3x - y = 1, and 3x - y = 8 U₁³ X
To find the value of the integral ∬R 2y dA, where R is the parallelogram enclosed by the lines x - 2y = 0, x - 2y = 4, 3x - y = 1, and 3x - y = 8, we need to set up the limits of integration for the double integral.
First, let's find the points of intersection of the given lines.
For x - 2y = 0 and x - 2y = 4, we have:
x - 2y = 0 ...(1)
x - 2y = 4 ...(2)
By subtracting equation (1) from equation (2), we get:
4 - 0 = 4
0 ≠ 4,
which means the lines are parallel and do not intersect.
For 3x - y = 1 and 3x - y = 8, we have:
3x - y = 1 ...(3)
3x - y = 8 ...(4)
By subtracting equation (3) from equation (4), we get:
8 - 1 = 7
0 ≠ 7,
which also means the lines are parallel and do not intersect.
Since the lines do not intersect, the parallelogram R enclosed by these lines does not exist. Therefore, the integral ∬R 2y dA is not applicable in this case.
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find n < 1=78 →n=12 integral
The integral of n^(-1/78) with respect to n is equal to n^(12) + C, where C is the constant of integration.
To find the integral of n^(-1/78) with respect to n, we use the power rule of integration. According to the power rule, the integral of x^n with respect to x is (x^(n+1))/(n+1) + C, where C is the constant of integration. In this case, the exponent is -1/78. Applying the power rule, we have:
∫n^(-1/78) dn = (n^(-1/78 + 1))/(−1/78 + 1) + C = (n^(77/78))/(77/78) + C.
Simplifying further, we can rewrite the exponent as 12/12, which gives:
(n^(77/78))/(77/78) = (n^(12/12))/(77/78) = (n^12)/(77/78) + C.
Therefore, the integral of n^(-1/78) with respect to n is n^12/(77/78) + C, where C represents the constant of integration.
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Two angles are complementary. One angle measures 27. Find the measure of the other angle. Show your work and / or explain your reasoning
Answer:
63°
Step-by-step explanation:
Complementary angles are defined as two angles whose sum is 90 degrees. So one angle is equal to 90 degrees minuses the complementary angle.
The other angle = 90 - 27 = 63
Let z= f (x, y) = 3 x ² + 6x y -5 y ². Define Az = f(x+dx, y +dy)− f(x, y) and dz= f₁'(x, y )dx + f₂'(x, y )d y. Compute Az - dz.
To compute Az - dz, we first need to calculate the partial derivatives of the function f(x, y) = 3x² + 6xy - 5y².
Given function:
f(x, y) = 3x² + 6xy - 5y²
Partial derivative with respect to x (f₁'(x, y)):
f₁'(x, y) = ∂f/∂x = 6x + 6y
Partial derivative with respect to y (f₂'(x, y)):
f₂'(x, y) = ∂f/∂y = 6x - 10y
Now, let's calculate Az - dz:
Az = f(x + dx, y + dy) - f(x, y)
= [3(x + dx)² + 6(x + dx)(y + dy) - 5(y + dy)²] - [3x² + 6xy - 5y²]
= 3(x² + 2xdx + dx² + 2xydy + 2ydy + dy²) + 6(xdx + xdy + ydx + ydy) - 5(y² + 2ydy + dy²) - (3x² + 6xy - 5y²)
= 3x² + 6xdx + 3dx² + 6xydy + 6ydy + 3dy² + 6xdx + 6xdy + 6ydx + 6ydy - 5y² - 10ydy - 5dy² - 3x² - 6xy + 5y²
= 6xdx + 6xdy + 6ydx + 6ydy + 3dx² + 3dy² - 5dy² - 10ydy
dz = f₁'(x, y)dx + f₂'(x, y)dy
= (6x + 6y)dx + (6x - 10y)dy
Now, let's calculate Az - dz:
Az - dz = (6xdx + 6xdy + 6ydx + 6ydy + 3dx² + 3dy² - 5dy² - 10ydy) - ((6x + 6y)dx + (6x - 10y)dy)
= 6xdx + 6xdy + 6ydx + 6ydy + 3dx² + 3dy² - 5dy² - 10ydy - 6xdx - 6ydx - 6xdy + 10ydy
= (6xdx - 6xdx) + (6ydx - 6ydx) + (6ydy - 6ydy) + (6xdy + 6xdy) + (3dx² - 5dy²) + 10ydy
= 0 + 0 + 0 + 12xdy + 3dx² - 5dy² + 10ydy
= 12xdy + 3dx² - 5dy² + 10ydy
Therefore, Az - dz = 12xdy + 3dx² - 5dy² + 10ydy.
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Write the expression as a sum and/or difference of logarithms. Express powers as factors. 11/5 x² -X-6 In ,X> 3 11/5 x²-x-6 (x+7)3 (Simplify your answer. Type an exact answer. Use integers or fractions for any numbers in the expression.) (x+7)³
Given expression is 11/5 x² -x - 6 and we are required to write this expression as the sum and/or difference of logarithms and express powers as factors.
Expression:[tex]11/5 x² - x - 6[/tex]
The given expression can be rewritten as:
[tex]11/5 x² - 11/5 x + 11/5 x - 6On[/tex]
factoring out 11/5 we get:
[tex]11/5 (x² - x) + 11/5 x - 6[/tex]
The above expression can be further rewritten as follows:
11/5 (x(x-1)) + 11/5 x - 6
Simplifying the above expression we get:
[tex]11/5 x (x - 1) + 11/5 x - 30/5= 11/5 x (x - 1 + 1) - 30/5= 11/5 x² - 2.4[/tex]
Hence, the given expression can be expressed as the sum of logarithms in the form of
[tex]11/5 x² -x-6 = log (11/5 x(x-1)) - log (2.4)[/tex]
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Find the diagonalization of A 60 00 by finding an invertible matrix P and a diagonal matrix D such that PAP D. Check your work. (Enter each matrix in the form [[row 1], [row 21-1, where each row is a comma-separated list.) (D, P) -
Thus, we have successfully diagonalized matrix A. The diagonal matrix D is [[0, 0], [0, 6]], and the matrix P is [[1, 0], [0, 1]].
To find the diagonalization of matrix A = [[6, 0], [0, 0]], we need to find an invertible matrix P and a diagonal matrix D such that PAP⁽⁻¹⁾ = D.
Let's start by finding the eigenvalues of matrix A. The eigenvalues can be found by solving the equation det(A - λI) = 0, where I is the identity matrix.
A - λI = [[6, 0], [0, 0]] - [[λ, 0], [0, λ]] = [[6-λ, 0], [0, -λ]]
det(A - λI) = (6-λ)(-λ) = λ(λ-6) = 0
Setting λ(λ-6) = 0, we find two eigenvalues:
λ = 0 (with multiplicity 2) and λ = 6.
Next, we need to find the eigenvectors corresponding to each eigenvalue.
For λ = 0, we solve the equation (A - 0I)X = 0, where X is a vector.
(A - 0I)X = [[6, 0], [0, 0]]X = [0, 0]
From this, we see that the second component of the vector X can be any value, while the first component must be 0. Let's choose X1 = [1, 0].
For λ = 6, we solve the equation (A - 6I)X = 0.
(A - 6I)X = [[0, 0], [0, -6]]X = [0, 0]
From this, we see that the first component of the vector X can be any value, while the second component must be 0. Let's choose X2 = [0, 1].
Now we have the eigenvectors corresponding to each eigenvalue:
Eigenvector for λ = 0: X1 = [1, 0]
Eigenvector for λ = 6: X2 = [0, 1]
To form the matrix P, we take the eigenvectors X1 and X2 as its columns:
P = [[1, 0], [0, 1]]
The diagonal matrix D is formed by placing the eigenvalues along the diagonal:
D = [[0, 0], [0, 6]]
Now let's check the diagonalization: PAP⁽⁻¹⁾ = D.
PAP⁽⁻¹⁾= [[1, 0], [0, 1]] [[6, 0], [0, 0]] [[1, 0], [0, 1]]⁽⁻¹⁾ = [[0, 0], [0, 6]]
Thus, we have successfully diagonalized matrix A. The diagonal matrix D is [[0, 0], [0, 6]], and the matrix P is [[1, 0], [0, 1]].
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Identify the property that justifies each step asked about in the answer
Line1: 9(5+8x)
Line2: 9(8x+5)
Line3: 72x+45
Answer:
Step-by-step explanation:
Line 2: addition is commutative. a+b=b+a
Line 3: multiplication is distributive over addition. a(b+c)=ab+ac
Find the area of the region between the graph of y=4x^3 + 2 and the x axis from x=1 to x=2.
The area of the region between the graph of y=4x³+2 and the x-axis from x=1 to x=2 is 14.8 square units.
To calculate the area of a region, we will apply the formula for integrating a function between two limits. We're going to integrate the given function, y=4x³+2, between x=1 and x=2. We'll use the formula for calculating the area of a region given by two lines y=f(x) and y=g(x) in this problem.
We'll calculate the area of the region between the curve y=4x³+2 and the x-axis between x=1 and x=2.The area is given by:∫₁² [f(x) - g(x)] dxwhere f(x) is the equation of the function y=4x³+2, and g(x) is the equation of the x-axis. Therefore, g(x)=0∫₁² [4x³+2 - 0] dx= ∫₁² 4x³+2 dxUsing the integration formula, we get the answer:14.8 square units.
The area of the region between the graph of y=4x³+2 and the x-axis from x=1 to x=2 is 14.8 square units.
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f(x₁y) = x y let is it homogenuos? IF (yes), which degnu?
The function f(x₁y) = xy is homogeneous of degree 1.
A function is said to be homogeneous if it satisfies the condition f(tx, ty) = [tex]t^k[/tex] * f(x, y), where k is a constant and t is a scalar. In this case, we have f(x₁y) = xy. To check if it is homogeneous, we substitute tx for x and ty for y in the function and compare the results.
Let's substitute tx for x and ty for y in f(x₁y):
f(tx₁y) = (tx)(ty) = [tex]t^{2xy}[/tex]
Now, let's substitute t^k * f(x, y) into the function:
[tex]t^k[/tex] * f(x₁y) = [tex]t^k[/tex] * xy
For the two expressions to be equal, we must have [tex]t^{2xy} = t^k * xy[/tex]. This implies that k = 2 for the function to be homogeneous.
However, in our original function f(x₁y) = xy, the degree of the function is 1, not 2. Therefore, the function f(x₁y) = xy is not homogeneous.
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True or false? For nonzero m, a, b ≤ Z, if m | (ab) then m | a or m | b.
False. For nonzero integers a, b, and c, if a| bc, then a |b or a| c is false. The statement is false.
For nonzero integers a, b, and m, if m | (ab), then m | a or m | b is not always true.
For example, take m = 6, a = 4, and b = 3. It can be seen that m | ab, as 6 | 12. However, neither m | a nor m | b, as 6 is not a factor of 4 and 3.
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