Find the value of polynomial f(x)=2x^2-3x-2 if x = 1

Here is the summary of the relation J on all integers:

a. 1 J 2 : No

b. 2 J 1 : Yes

c. 3 J 6 : Yes

d. 17 J 51 : No

e. Another example of x and y in relation J: 4 J 12 (4 is related to 12 under relation J)

To define a relation J on all positive integers is following:

a. No, 1 is not a factor of 2, so 1 does not divide 2.

Therefore, 1 is not related to 2 under relation J.

b. Yes, 2 is a factor of 1 (specifically, 2 divides 1 zero times with a remainder of 1), so 2 divides 1.

Therefore, 2 is related to 1 under relation J.

c. Yes, 3 is a factor of 6 (specifically, 3 divides 6 two times with a remainder of 0), so 3 divides 6.

Therefore, 3 is related to 6 under relation J.

d. No, 17 is not a factor of 51, so 17 does not divide 51.

Therefore, 17 is not related to 51 under relation J.

e. Let's choose x = 4 and y = 12.

Then we need to check if x divides y. We can see that 4 is a factor of 12 (specifically, 4 divides 12 three times with a remainder of 0), so 4 divides 12.

Therefore, 4 is related to 12 under relation J.

To summarize:

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Mean of the above function is  8.500 and the variance is 6.875.

To determine the mean and variance of x for the given function f(x) = x/108 for 3 < x < 15, we need to first calculate the mean and then the variance.

The mean, also known as the expected value, is the average value of a random variable. In this case, the random variable is x, and we need to find the expected value of x for the given function.

The integral of f(x) with respect to x from 3 to 15 gives us the expected value or the mean of x:

∫(x/108)dx from 3 to 15

= (1/108)∫xdx from 3 to 15 (using the power rule of integration)

= (1/108) * [(x^2)/2] from 3 to 15

= (1/108) * [(15^2)/2 - (3^2)/2]

= (1/108) * [(225/2) - (9/2)]

= (1/108) * (216/2)

= (1/108) * 108

= 1

So, the mean of x is 1.

Variance is a measure of how much the values of a random variable deviate from the mean. It is calculated as the average of the squared differences between the values and the mean.

The formula for variance is given by Var(x) = E[x^2] - E[x]^2, where E[x] is the expected value or the mean of x.

From the previous calculation, we know that E[x] = 1.

Now, we need to find E[x^2]. For this, we need to square the function f(x) and then find its expected value.

(f(x))^2 = (x/108)^2

= x^2 / 11664

The integral of (f(x))^2 with respect to x from 3 to 15 gives us the expected value of x^2:

∫(x^2/11664)dx from 3 to 15

= (1/11664)∫x^2dx from 3 to 15

= (1/11664) * [(x^3)/3] from 3 to 15

= (1/11664) * [(15^3)/3 - (3^3)/3]

= (1/11664) * [(3375/3) - (27/3)]

= (1/11664) * (3348/3)

= 0.286

Now, substituting the values of E[x^2] and E[x] into the formula for variance, we get:

Var(x) = E[x^2] - E[x]^2

= 0.286 - 1^2

= 0.286 - 1

= -0.714

So, the variance of x is -0.714.

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For the first question, we need to find the chi-square statistic value. Using the given table, we can calculate the expected frequencies and then use the chi-square formula to get the value.

The calculated chi-square value is 13.99. Since alpha is 0.1, we compare this value to the critical chi-square value at 2 degrees of freedom (since we have 2 rows and 3 columns), which is 4.605. Since the calculated value is greater than the critical value, we reject the null hypothesis that the listed occupations and personality preferences are independent.

For the second question, we need to find the P-value of the sample test statistic. Using the given table, we can calculate the expected frequencies and then use the chi-square formula to get the chi-square value. The calculated chi-square value is 6.27. Since we have 2 degrees of freedom, we can find the P-value using a chi-square distribution table or calculator. The calculated P-value is 0.043, which is less than alpha (0.01). Therefore, we reject the null hypothesis that the listed occupations and personality preferences are independent.

For the third question, we need to find the P-value of the sample test statistic and then determine whether to reject or fail to reject the null hypothesis. Using the given table, we can calculate the expected frequencies and then use the chi-square formula to get the chi-square value.

The calculated chi-square value is 3.39. Since we have 2 degrees of freedom, we can find the P-value using a chi-square distribution table or calculator. The calculated P-value is 0.183, which is greater than alpha (0.1). Therefore, we fail to reject the null hypothesis that the listed occupations and personality preferences are independent at the 0.10 level of significance.

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The trigonometric identity is sin²(u)/cos²(u) = tan²(u).

The study of the correlation between a right-angled triangle's sides and angles is the focus of one of the most significant branches of mathematics in history: trigonometry.

sin²(u) + cos²(u) = 1 is the trigonometric identity that relates the three basic trigonometric functions sine (sin), cosine (cos), and tangent (tan) of an angle u in a right-angled triangle.

However, to derive the identity sin²(u) / cos²(u) = tan²(u), we can start with the definition of tangent: tan(u) = sin(u) / cos(u).

Then, we can square both sides of the equation:

tan²(u) = (sin(u) / cos(u))²

tan²(u) = sin²(u) / cos²(u)

Therefore, sin²(u) / cos²(u) = tan²(u).

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The complete question is:

Fill in the blank to complete the trigonometric identity. sin²(u)__cos²(u) = tan²(u)

the triangle has already two 60°, so that means the angle atop is hmm well, 60° :), so we have an equilateral triangle, with a side of 12

[tex]\textit{area of an equilateral triangle}\\\\ A=\cfrac{s^2\sqrt{3}}{4} ~ \begin{cases} s=\stackrel{length~of}{a~side}\\[-0.5em] \hrulefill\\ s=12 \end{cases}\implies A=\cfrac{12^2\sqrt{3}}{4}\implies A=36\sqrt{3}\implies A\approx 62.35[/tex]

The area of a cookie with radius of 10cm is given as follows:

A = 314 cm².

The area of a circle of radius r is given by the multiplication of π and the radius squared, as follows:

A = πr².

The cookie has a circular format, hence the equation used was presented above.

The radius is given as follows:

r = 10 cm.

Hence the area is given as follows:

A = 3.14 x 10²

A = 314 cm².

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The area of a cookie with radius of 10cm is given as follows:

A = 314 cm².

The area of a circle of radius r is given by the multiplication of π and the radius squared, as follows:

A = πr².

The cookie has a circular format, hence the equation used was presented above.

The radius is given as follows:

r = 10 cm.

Hence the area is given as follows:

A = 3.14 x 10²

A = 314 cm².

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Therefore, we can use cofactor expansion along column 3 to calculate the determinant of matrix A.

The determinant of a 5x5 matrix can be calculated by expanding along any row or column. However, we can try to minimize the number of determinants that need to be computed in the second step by selecting the row or column with the most zeros.

In this case, we can see that column 3 has three zeros, which means that expanding along this column will result in the fewest number of determinants that need to be computed in the second step. Therefore, we can use cofactor expansion along column 3 to calculate the determinant of matrix A.

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A real relationship, not accounted by other variables, is a causal relationship. This type of association suggests that one variable directly causes changes in the other. In other words, there is a cause-and-effect relationship between the two variables.

In this type of association, changes in one variable directly cause changes in the other variable, without any other variables influencing the relationship. This contrasts with spurious or indirect associations, where the relationship between two variables is due to the influence of other variables. To determine if an association is a real relationship, researchers often control for potential confounding variables to isolate the direct effect of the variables in question. However, it is important to note that establishing a causal relationship requires careful research design and data analysis to rule out the effects of other variables that could be influencing the relationship.

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Refer to the photo taken. Comment any questions you may have.

The values we have found, we get:

a. sin(2theta) = 2(-20/29)(21/29) = -840/841

b. cos(2theta) = (21/29)² - (-20/29)² = 441/841 - 400/841 = 41/841

c. tan(2theta) = (2(-20/29))/(1 - (-20/29)²) = 40/9

What is trigonometry?

Trigonometry is a branch of mathematics that deals with the relationships between the sides and angles of triangles.

Since cos(theta) is positive and lies in quadrant IV, we know that sin(theta) is negative. We can use the Pythagorean identity to find sin(theta):

sin²(theta) + cos²(theta) = 1

sin²(theta) = 1 - cos²(theta)

sin(theta) = -sqrt(1 - cos²(theta))

Substituting cos(theta) = 21/29, we get:

sin(theta) = -sqrt(1 - (21/29)²) = -20/29

Now, we can use the double angle formulas to find sin(2theta), cos(2theta), and tan(2theta):

sin(2theta) = 2sin(theta)cos(theta)

cos(2theta) = cos²(theta) - sin²(theta)

tan(2theta) = (2tan(theta))/(1 - tan²(theta))

Substituting the values we have found, we get:

a. sin(2theta) = 2(-20/29)(21/29) = -840/841

b. cos(2theta) = (21/29)² - (-20/29)² = 441/841 - 400/841 = 41/841

c. tan(2theta) = (2(-20/29))/(1 - (-20/29)²) = 40/9

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The area of the canvas can be calculated by taking the product of its length and width, which is 2w-5 and w+2, respectively, and then simplifying this expression to 5w²+3w-2, which is option D.

An expression is a mathematical statement that contains numbers, variables, and operations but lacks the equal sign.

To calculate the area of the canvas, we need to know the length and width of the canvas.

Since the length of the canvas will be 5 inches less than twice the width, the length can be expressed as:

2w-5.

The width of the canvas must include the extra 2 inches of fabric on each side to stretch and secure it around the frame, so the width is expressed as:

w+2.

The area of the canvas is then the product of the length and width,

= (2w-5)(w+2).

When this equation is simplified, it reduces to 5w²+3w-2, which is option D.

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The value of the constant c for which the integral converges is c > 2.

The value of the convergent integral for this value of c is π/4c.

To find the value of the constant c for which the integral converges, we need to determine the range of values for c that makes the integral finite.

Using the limit comparison test, we compare the given integral with the integral ∫[infinity]0 xx^2 dx, which is known to converge.

lim x→∞ [(xx^2 1−c3x 1) / xx^2] = lim x→∞ [1/(x^(c-1))]

This limit converges if and only if c-1 > 1, or c > 2. Therefore, the integral converges for c > 2.

To evaluate the integral for this value of c, we need to use partial fractions.

(xx^2 1−c3x 1) = A/x + Bx + C/(x^2+1)

Multiplying both sides by x(x^2+1) and equating coefficients, we get

A = 0
B = -c/3
C = 1/2

Substituting these values into the partial fraction decomposition and integrating, we get

∫[infinity]0 (xx^2 1−c3x 1) dx = ∫[infinity]0 [-c/3 x + 1/2 (arctan x)] dx

Evaluating this integral from 0 to infinity, we get

-c/6 [x^2]0∞ + 1/2 [arctan x]0∞ = π/4c

Therefore, the value of the constant c for which the integral converges is c > 2, and the value of the convergent integral for this value of c is π/4c.

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The value of the constant c for which the integral converges is c > 2.

The value of the convergent integral for this value of c is π/4c.

To find the value of the constant c for which the integral converges, we need to determine the range of values for c that makes the integral finite.

Using the limit comparison test, we compare the given integral with the integral ∫[infinity]0 xx^2 dx, which is known to converge.

lim x→∞ [(xx^2 1−c3x 1) / xx^2] = lim x→∞ [1/(x^(c-1))]

This limit converges if and only if c-1 > 1, or c > 2. Therefore, the integral converges for c > 2.

To evaluate the integral for this value of c, we need to use partial fractions.

(xx^2 1−c3x 1) = A/x + Bx + C/(x^2+1)

Multiplying both sides by x(x^2+1) and equating coefficients, we get

A = 0
B = -c/3
C = 1/2

Substituting these values into the partial fraction decomposition and integrating, we get

∫[infinity]0 (xx^2 1−c3x 1) dx = ∫[infinity]0 [-c/3 x + 1/2 (arctan x)] dx

Evaluating this integral from 0 to infinity, we get

-c/6 [x^2]0∞ + 1/2 [arctan x]0∞ = π/4c

Therefore, the value of the constant c for which the integral converges is c > 2, and the value of the convergent integral for this value of c is π/4c.

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The final price of the shirt is 1/2 of $12.50, which is $6.25.

To calculate the final price of the shirt, we first need to determine what "1/2 off" means. This means the shirt is now being sold for half of its original price, which is $25.0/2 = $12.50.

Next, we need to determine what "Take an additional 1/2 off" means. This means that we need to take half of the discounted price of $12.50, which is

and subtract it from the discounted price:

Therefore, the final price of the shirt is $6.25.

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Answer:

Step-by-step explanation:

You want the apothem, perimeter, and area of a regular pentagon with side length 12 ft.

The apothem is one leg of the right triangle that is half of one of the sectors. The other leg is half the side length. This gives ...

  tan(36°) = (6 ft)/a

  a = (6 ft)/tan(36°) ≈ 8.25829 ft

The perimeter is simply 5 times the side length:

  (12 ft) × 5 = 60 ft

The area is given by the formula ...

  A = 1/2Pa

  A = 1/2(60 ft)(8.25829 ft) ≈ 247.749 ft²

__

Additional comment

An n-sided regular polygon with side length s has an area of ...

  A = [s²n]/[4tan(180°/n)]

For s=12 and n=5, this is ...

  A = 12²·5/(4·tan(180°/5)) = 180/tan(36°) ≈ 247.7 . . . . square feet

Answer: 65

Step-by-step explanation:

area of triangle = 1/2 of base * height

so 13*10 = 130

130 * 1/2 = 65

The missing side length. Round to the nearest tenth if needed is 10.2

Let the length of the missing side = "s" Applying the Pythagorean theorem to this right triangle gives:

4^2 + s^2 = 11^2  

 => 16 + s^2 = 121      

=>     ( 4*4 = 16, 11*11 = 121)

16 - 16  + s^2 = 121 - 16 =>     (subtract 16 from both sides)

s^2 = 105 =>

x = sqrt (105) which is approximately 10.2

Therefore the missing length is 10.2 units

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The probability that three randomly chosen people have different birth date is 0.9918.

To calculate the probability that three randomly chosen people have different birthdates, we can first consider the probability that the second person chosen does not have the same birth day as the first person.

This probability is (364/365), since there are 364 possible birthdates that are different from the first person's birthdate, out of 365 possible birthdates overall.

Similarly, the probability that the third person chosen does not have the same birthdate as either of the first two people is (363/365), since there are now only 363 possible birthdates left that are different from the first two people's birthdates.

To find the overall probability that all three people have different birthdates, we can multiply these individual probabilities together:

(364/365) x (363/365) = 0.9918

So the probability that three randomly chosen people have different birth date is approximately 0.9918, or about 99.2%.

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The probability that three randomly chosen people have different birthdates is approximately 0.9918, or 99.18%.

The counting principle can be used to determine how many different birthdates can be selected from a pool of 365 potential dates. As we assume that people are born with equal probability on each of the 365 days of the year (ignoring leap years).

The first individual can be born on any of the 365 days. The second individual can be born on any of the remaining 364 days. The third individual can be born on any of the remaining 363 days. Therefore, the total number of ways to choose three different birthdates is:

365 x 364 x 363

Let's now determine how many different ways there are to select three birthdates that are not mutually exclusive (i.e., they can be the same). The number of ways to select three birthdates from the 365 potential dates is simply this:

365 x 365 x 365

Consequently, the likelihood that three randomly selected individuals have different birthdates is:

(365 x 364 x 363) / (365 x 365 x 365) ≈ 0.9918

Therefore, the likelihood is roughly 0.9918, or 99.18%.

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The area of the actual flower bed include the following: D. 96 square meters.

In Mathematics and Geometry, the area of a triangle can be calculated by using this formula:

Where:

Scale:

0.5 cm = 2 m

0.5/2 = New length of flower bed/Actual length of flower bed

Actual length of flower bed = (2 × 3)/0.5 = 12 meters

0.5/2 = New height of flower bed/Actual height of flower bed

Actual height of flower bed = (2 × 4)/0.5 = 16 meters

By substituting the given parameters into the formula, we have;

Area of triangle = 1/2 × base area × height

Area of actual flower bed = 1/2 × 12 × 16

Area of actual flower bed = 96 m².

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Missing information:

The question is incomplete and the complete question is shown in the attached picture.

To solve the equation f(x, y) = 8y cos(x), 0 ≤ x ≤ 2, means to find the values of y that satisfy the equation for each given value of x between 0 and 2. To do this.

we can isolate y by dividing both sides by 8cos(x): f(x, y)/(8cos(x)) = y So the solution for y is y = f(x, y)/(8cos(x)), for any given value of x between 0 and 2. you'll want to evaluate the function within this range of x values. However, since the function has two variables (x and y), we cannot provide a unique solution without additional constraints or information about the variable y.

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The probability of outcome e4 is 0.1, which means the option (b). 0.100 is the correct answer.

To comprehend this response, keep in mind that the total probability for all outcomes in an experiment must equal 1. We now know the probability for e1, e2, and e3, which total 0.9 (0.2 + 0.3 + 0.4 = 0.9). Because the total of probabilities must equal one, we may remove 0.9 from one to get the chance of e4. As a result, the likelihood of e4 is 0.1 (1 - 0.9 = 0.1).

In other words, there are four possible outcomes in this experiment, with probabilities 0.2, 0.3, 0.4, and an unknown for e4. We may multiply the known probabilities by 0.9, leaving 0.1 for e4. This means that there is a 10% chance of outcome e4 occurring in this experiment.

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Thus, the number of adult tickets that were sold that day was 60.

A linear equation with two variables is shown by the equation axe + by = r if a, b, and r are all real values and both are not equal to 0. The equation's two variables are represented by the letters x and y. The coefficients are denoted by the numerals a and b.

When the unknown variables in a polynomial equation have a degree of one, the equation is said to be linear. In other words, a linear equation's unknown variables are all increased to the power of 1.

For the given question:

Let the number of child tickets - x

Let the number of adult ticket - y

Price of each  child tickets - $6.10

Price of each adult ticket- - $9.40

Thus, the system of linear equation forms -

x + y = 136

x = 136 - y   ...eq 1

6.10x + 9.40y = 1027.60 ..eq 2

Put the value of x in eq 2

6.10x + 9.40y = 1027.60

6.10(136 - y) + 9.40y = 1027.60

829.6 - 6.10y + 9.40y = 1027.60

3.3y = 1027.60 - 829.6

3.3y = 198

y = 198/3.3

y = 60

x = 136 - 90

x = 46

Thus, the number of adult tickets that were sold that day was 60.

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The word problem for the company is:

An electricity company charges its customers a monthly service fee of $3.50 plus 8.3 cents per kWH. Find the total cost for a month if 250kW is used.

A word problem is a mathematical problem presented in the form of a story or a narrative, usually involving real-world scenarios or situations.

Word problems often require the use of arithmetic, algebra, geometry, or other mathematical concepts and methods to find a solution. They can range in complexity from simple arithmetic problems to multi-step equations involving multiple variables.

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True, if A is an invertible n x n matrix, then the equation Ax = b is consistent for each b in Rⁿ.

When A is an invertible n x n matrix, it means that A has a unique inverse, denoted as A⁻¹, which is also an n x n matrix. This implies that for any given vector b in Rⁿ, there exists a unique solution x in Rⁿ that satisfies the equation Ax = b.

To understand why this is true, consider the definition of matrix multiplication. In the equation Ax = b, A is multiplied by x to obtain b. Since A is invertible, we can multiply both sides of the equation by A⁻¹ (the inverse of A) on the left, yielding A⁻¹Ax = A⁻¹b.

Now, according to the properties of matrix multiplication, A⁻¹A results in the identity matrix I_n (an n x n matrix with ones on the diagonal and zeros elsewhere), and any vector multiplied by the identity matrix remains unchanged. Therefore, we get I_nx = A⁻¹b, which simplifies to x = A⁻¹b.

This shows that for any given vector b in Rⁿ, there exists a unique solution x = A⁻¹b that satisfies the equation Ax = b when A is an invertible matrix. Hence, the equation Ax = b is consistent for each b in Rⁿ.

Therefore, the correct answer is True.

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The value of the definite integral ∫(from 0 to 3) [tex]e^{(2x)[/tex] dx is [tex](1/2)(e^6 - 1).[/tex]

To evaluate the definite integral, you'll need to find the antiderivative of the function [tex]e^{(2x)[/tex] and then apply the limits of integration (0 to 3).

The antiderivative of  [tex]e^{(2x)[/tex] is [tex](1/2)e^{(2x)[/tex], since the derivative of [tex](1/2)e^{(2x)[/tex] with respect to x is [tex]e^{(2x)[/tex]. Now, you can apply the Fundamental Theorem of Calculus:

∫(from 0 to 3) [tex]e^{(2x)[/tex] dx = [tex][(1/2)e^{(2x)][/tex](from 0 to 3)

First, substitute the upper limit (3) into the antiderivative:

[tex](1/2)e^{(2*3)} = (1/2)e^6[/tex]
Next, substitute the lower limit (0) into the antiderivative:

[tex](1/2)e^{(2*0)} = (1/2)e^0 = (1/2)[/tex]

Now, subtract the result with the lower limit from the result with the upper limit:

[tex](1/2)e^6 - (1/2) = (1/2)(e^6 - 1)[/tex]

So, the exact value of the definite integral is:

[tex](1/2)(e^6 - 1)[/tex]

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The area of Kite PQRS at the right is concave. If we have PQ = QR = 20, PS= SR= 15, and QS = 7 is  220 square units

First, we can find the length of the diagonal PR using the Pythagorean theorem:

PR² = PQ² + QR² = 20² + 20² = 800

PR = sqrt(800) ≈ 28.28

Similarly, we can find the length of the diagonal QS:

QS² = QR² + RS² = 20² + 15² = 625

QS = sqrt(625) = 25

Now, we can split the kite into two triangles, PQS and QRS, and use the formula for the area of a triangle:

area of PQS = (1/2) * PQ * QS = (1/2) * 20 * 7 = 70

area of QRS = (1/2) * QR * RS = (1/2) * 20 * 15 = 150

So the total area of the kite is:

area of PQRS = area of PQS + area of QRS = 70 + 150 = 220

Therefore, the area of kite PQRS is 220 square units

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No chemical reaction occurs, so the answer is nr.

To write the balanced molecular chemical equation for the reaction in aqueous solution for copper(I) bromide and potassium sulfate, we first need to identify the products that are formed in the reaction.

The chemical reaction takes place as follows:
Copper(I) bromide (CuBr) reacts with potassium sulfate (K2SO4) in aqueous solution to potentially form copper(I) sulfate (Cu2SO4) and potassium bromide (KBr). However, copper(I) sulfate is unstable and will disproportion into copper(II) sulfate (CuSO4) and copper and no insoluble product is formed which is formed as a ppt.

Therefore, there will be no chemical reaction between copper(I) bromide and potassium sulfate in aqueous solution.

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The sequence  aₙ = 2n is divergent.

To show that the sequence aₙ is divergent, we need to show that it does not converge to a finite limit.

Let's assume that the sequence aₙ converges to some finite limit L, i.e., lim(aₙ) = L. Then, for any ε > 0, there exists an integer N such that |aₙ - L| < ε for all n ≥ N.

Let's choose ε = 1. Then, there exists an integer N such that |aₙ - L| < 1 for all n ≥ N. In particular, this means that |2n - L| < 1 for all n ≥ N.

However, this is impossible because as n gets larger, 2n gets arbitrarily large and so it is not possible for |2n - L| to remain less than 1 for all n ≥ N. Therefore, our assumption that aₙ converges to a finite limit L is false, and hence aₙ is divergent.

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The given question is incomplete, the complete question is:

Show that each of the following sequences is divergent aₙ=2n