Find the first six terms of the sequence defined by each
of these recurrence relations and initial conditions.
a) an = -2an-1, a0 = -1
b) an = an-1 - an-2, a0 = 2, a1 = -1
c) an = 3a2
n-1, a0 = 1
d) an = nan-1 + a2
n-2, a0 = -1, a1 = 0
e) an = an-1 - an-2 + an-3, a0 = 1, a1 = 1, a2 = 2

95% confidence interval for the population mean is 170.2 to 189.8, option d is correct.

We are given the following information:

- Sample size (n) = 225
- Standard deviation (σ) = 75
- Sample mean (x) = 180
- Confidence level = 95%

We need to calculate the 95% confidence interval for the population mean (μ). To do this, we will use the formula:

Confidence interval = x ± (z × σ/√n)

First, we need to find the z-score that corresponds to a 95% confidence level. For a 95% confidence interval, the z-score is 1.96 (you can find this value in a standard z-score table).

Now, we can plug in the values we have:

Confidence interval = 180 ± (1.96 × 75/√225)

Calculate the standard error (σ/√n):

Standard error = 75/√225 = 5

Now, calculate the margin of error (z * standard error):

Margin of error = 1.96 × 5 = 9.8

Finally, calculate the confidence interval:

Confidence interval = 180 ± 9.8 = (170.2, 189.8)

So, the 95% confidence interval for the population mean is 170.2 to 189.8, which corresponds to option d.

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Standard deviation of X is 9.28 and the expected value of the X^2 is 92.5.
Explanation: - given probability distribution where x is -2,3,5 and f(x) is 0.3, 0.2, 0.5 respectively to the standard deviation we follow the below steps.

(a) Find the standard deviation of X.

Step 1: Find the expected value of X (E[X]).
E[X] = Σ[x * f(x)] = (-2 * 0.3) + (3 * 0.2) + (5 * 0.5) = -0.6 + 0.6 + 2.5 = 2.5

Step 2: Find the expected value of X^2 (E[X^2]).
E[X^2] = Σ[x^2 * f(x)] = (-2^2 * 0.3) + (3^2 * 0.2) + (5^2 * 0.5) = 12 + 18 + 62.5 = 92.5

Step 3: Calculate the variance of X (Var[X]).
Var[X] = E[X^2] - (E[X])^2 = 92.5 - (2.5)^2 = 92.5 - 6.25 = 86.25

Step 4: Find the standard deviation of X (SD[X]).
SD[X] = √Var[X] = √86.25 ≈ 9.28

Thus, standard deviation of X is approximately 9.28.

(b) Find the expected value of X^2.

We have already calculated this value in Step 2 while finding the standard deviation.

The expected value of X^2 is 92.5, rounded off to four decimal places.

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if we get the area of the 6x2.4 rectangle, and then subtract the area of the rectangle inside, the 2x4.4 one, what's leftover, is the part we didn't subtract, namely, the shaded part.

[tex]\stackrel{ \textit{containing rectangle} }{(6)(2.4)}~~ - ~~\stackrel{ \textit{inner rectangle} }{(2)(4.4)}\implies 14.4~~ - ~~8.8\implies \text{\LARGE 5.6}~cm^2[/tex]

Answer:

approximately 1,392 grams

Step-by-step explanation:

The decay of a radioactive substance can be modeled using the formula:

N(t) = N0 * (1/2)^(t / T)

where:

N(t) is the amount of the substance remaining after time t,

N0 is the initial amount of the substance,

t is the time for which we want to calculate the remaining amount,

T is the half-life of the substance.

Given that you have 44,544 grams of europium and its half-life is 9 years, we can use the formula to calculate the amount remaining after 45 years.

Plugging in the values:

N0 = 44,544 grams

t = 45 years

T = 9 years

N(45) = 44,544 * (1/2)^(45/9)

Now we can calculate N(45):

N(45) = 44,544 * (1/2)^(5)

Using the exponent rule for fractional exponents:

(1/2)^5 = 1/32

N(45) = 44,544 * 1/32

N(45) = 1,392 grams (rounded to the nearest gram)

So, after 45 years, approximately 1,392 grams of europium will be left.

Total area will be 66 square feet (rounded to the nearest tenth).

To find the total area of the sidewalk, we need to know the dimensions of each shape.

Let's assume the rectangles have width w and length l, and the trapezoid has top base t, bottom base b, and height h.

Since the rectangles are congruent, we can add their areas together by multiplying the area of one rectangle by 3:

Area of rectangles = 3 * (w * l)

The area of the trapezoid is equal to the average of the two bases multiplied by the height:

Area of trapezoid = (1/2) * (t + b) * h

Now we need to figure out the values of w, l, t, b, and h.

Since the shapes are part of the same sidewalk, their dimensions must fit together. One possible configuration is for the rectangles to be arranged in a line, with the trapezoid on one end. In this case, the total length of the sidewalk is equal to the length of the rectangles plus the length of the trapezoid:

l = 3w + t

To simplify the problem, let's assume that the trapezoid has a height equal to the width of the rectangles, or h = w. This means that the top base of the trapezoid is equal to the sum of the widths of the two adjacent rectangles:

t = 2w

And the bottom base of the trapezoid is equal to the width of the third rectangle:

b = w

Substituting these values into the equation for the length of the sidewalk, we get:

l = 3w + 2w = 5w

Now we can calculate the area of the sidewalk:

Area of rectangles = 3 * (w * l) = 15[tex]w^{2}[/tex]  

Area of trapezoid = (1/2) * (t + b) * h = (1/2) * (2w + w) * w = 1.5[tex]w^{2}[/tex]  

Total area = Area of rectangles + Area of trapezoid = 15[tex]w^{2}[/tex]  + 1.5[tex]w^{2}[/tex]   = 16.5[tex]w^{2}[/tex]  

To round to the nearest tenth of a square foot, we need to know the units of measurement. Assuming the dimensions are in feet, the area is in square feet. Therefore, we can simply substitute a value for w (in feet) and multiply by 16.5 to get the area in square feet, rounded to the nearest tenth. For example, if we assume w = 2 feet, then:

Total area = 16.5 * [tex](2 feet)^{2}[/tex] = 66 square feet (rounded to the nearest tenth)

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Only table 2 is a function since it is a one to one mapping

A function is a one-to-one mapping of an equation.

Since we have four expressions to determine if they are functions, we notice that

So, only table 2 is a function

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The number line with plotted numbers 0, 1, 2, 3, 4, and 5 is present in above figure. The mixed number would be plotted where the arrow is pointing on the number line is equals to the [tex]2\frac{ 1}{4} [/tex].

A fraction, often called a fraction, is a combination of a number (integer) and a fraction (part of a whole number). So it has two parts. [tex]4 \frac{1}{7} [/tex] is an example of a mixed number. A number line is a horizontal line in which numbers are evenly distributed. It is used to pictorial representation of numbers. We have numbers for plotting on number line and conditions for plotting are

Now, the plotted number line is present in above figure. See the figure carefully. From the figure the mixed number that would plotted on red mark is [tex]2 \frac{1}{4} [/tex].

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Answer:

In a 30°-60°-90° right triangle, the length of the hypotenuse is twice the length of the shorter leg, and the length of the longer leg is √3 times the length of the shorter leg.

2) DE = 2 × 5 = 10, DF = 5√3

3) MO = 3√3, LM = 3√3√3 = 9

4) LK = 2√6/√3 = 2√2, JK = 2 × 2√2 = 4√2

The maximum speed occurs when the angle of elevation of the plane is 90 degrees (i.e., a vertical drop)

(a) The speed of the ball bearing after t seconds is given by the derivative of s(t) with respect to t:

s'(t) = 9.8 (sin theta) t

(b)

t (seconds) theta = 30 degrees theta = 45 degrees theta = 60 degrees

0 0 0 0

1 4.9 6.8 8.8

2 9.8 13.7 17.6

3 14.7 20.5 26.4

4 19.6 27.4 35.2

5 24.5 34.2 44.0

To find the value of theta that produces the maximum speed at a particular time, we need to find the derivative of s'(t) with respect to theta:

s''(t) = 9.8 t cos(theta)

Setting s''(t) to zero, we find that cos(theta) = 0, which means theta = 90 degrees. Therefore, the maximum speed occurs when the angle of elevation of the plane is 90 degrees (i.e., a vertical drop).

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To maximize a^2 + b^2, we can use the fact that the sum of two nonnegative real numbers a and b whose sum is 23 is constant. This means that as one number increases, the other must decrease in order to keep the sum at 23. Therefore, to maximize the sum of their squares, a and b must be equal.

So, if a = b, then 2a = 23, or a = b = 11.5. Therefore, the two nonnegative real numbers a and b whose sum is 23 and maximize a^2 + b^2 are 11.5 and 11.5.

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The acceleration of the particle at S = 40 m is approximately 2[tex]m/s^2[/tex]

To determine the acceleration of the particle when S = 40 m, we need to use the information given in the graph. The graph shows the velocity of the particle as a function of its displacement, S. Recall that acceleration is the rate of change of velocity with respect to time.

We can estimate the acceleration at S = 40 m by finding the slope of the tangent line to the velocity curve at that point.

One way to estimate the slope of the tangent line is to draw a line that is as close as possible to the curve at the point S = 40 m, and then find the slope of that line. We can use a ruler to draw a tangent line that intersects the curve at S = 40 m, as shown in the graph.

We then measure the displacement and velocity of two points on the tangent line, one on either side of S = 40 m. For example, we might choose the points S = 35 m and S = 45 m, and find their corresponding velocities, which are approximately v = 25 m/s and v = 45 m/s, respectively.

The slope of the tangent line is then given by the change in velocity over the change in displacement:

acceleration = (v2 - v1) / (S2 - S1)

Substituting the values we found, we get:

acceleration = (45 m/s - 25 m/s) / (45 m - 35 m) = 2[tex]m/s^2[/tex]

Therefore, the acceleration of the particle at S = 40 m is approximately 2[tex]m/s^2[/tex].

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To construct the exponential function that contains the points (0,-2) and (3,-128), we can use the general form of an exponential function:

y = a * b^x

where y is the function value, x is the input value, b is the base of the exponential function, and a is a constant representing the y-intercept. To find the specific exponential function that contains the two given points, we need to solve for a and b using the given coordinates.

First, we can use the point (0,-2) to find the value of a:

-2 = a * b^0
-2 = a * 1
a = -2

Next, we can use the point (3,-128) to find the value of b:

-128 = -2 * b^3
64 = b^3
b = 4

Now that we know the values of a and b, we can write the exponential function:

y = -2 * 4^x

Therefore, the exponential function that contains the points (0,-2) and (3,-128) is y = -2 * 4^x.

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The derivative of the function f(x) is f'(x) = (2x - 3)³[20x⁴ + 44x³ + 56x² + 40x + 8(x² + x + 1)⁵].

The derivative of the function f(x) = (2x − 3)4(x²+ x +1)5 is obtained by using the product rule and chain rule of differentiation. The product rule states that the derivative of the product of two functions is equal to the first function times the derivative of the second function plus the second function times the derivative of the first function.

The chain rule states that the derivative of a function composed with another function is equal to the derivative of the outer function times the derivative of the inner function. Applying these rules, the derivative of f(x) is given by:

f'(x) = 4(2x - 3)³(x² + x + 1)⁵ + (2x - 3)⁴(5x⁴ + 10x³ + 10x²)

This can be simplified by factoring out (2x - 3)^3 from both terms:

f'(x) = 4(2x - 3)³(x² + x + 1)⁵ + (2x - 3)³(5x⁴ + 10x³ + 10x²)²

= (2x - 3)³[4(x² + x + 1)⁵ + 2(5x⁴ + 10x³ + 10x²)]

= (2x - 3)³[20x⁴ + 44x³ + 56x² + 40x + 8(x² + x + 1)⁵]

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The probability of the horse not winning the race is 0.875 or 7/8, given that the odds against the horse winning the race were set at 7 to 1.

When the odds against a horse winning a race are set at 7 to 1, it means that for every 7 times the horse loses, it will win once. In other words, the probability of the horse winning is 1/8 or 0.125.

To find the probability of the horse not winning the race, we can subtract the probability of winning from 1. So, the probability of the horse not winning is:

1 - 0.125 = 0.875 or 7/8

This means that there is a 7/8 chance that the horse will lose the race. It is important to note that the odds and probabilities are two different ways of expressing the same information. The odds are a ratio of the probability of winning to the probability of losing, while the probability is simply the chance of an event occurring.

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If you buy 9 bottles of juice at R9.55 apiece and give the clerk R100, you will get around R14.05 in change.

The total cost of buying 9 bottles of juice at R9.55 each is:

9 x R9.55 = R85.95

If you give the cashier R100, the change you should receive is:

R100 - R85.95 = R14.05

So, approximately R14.05 is the change you will get if you buy 9 bottles of juice at R9.55 each and give the cashier R100.

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Step-by-step explanation:

They will pay $ 360    PLUS 20% of 360        (20% is .20 in decimal)

$   360 ( 1 + .20)  

 $  360 ( 1.20) = $ 432

Significant figures and include the appropriate units is [tex]r = 1.166 \times 10^{(-10)}[/tex]

Count up all of the bonds. Determine how many bond groups there are between individual atoms. By the total number of bonding groups in the molecule, divide the number of bonds between atoms. X-Ray crystallography is the only reliable method of determining molecule size. This gives you the crystal structure, including the positions of every atom, and you consequently know the size of the molecule. Any substance that can be crystallised can be used in this procedure, even huge molecules like protein and DNA.

spacing between lines [tex]=4.236*10^{10} s^{(-1)}[/tex]

atomic mass of Li = 7.0160 amu

atomic mass of cl = 34.9688

Bond length of molecule

B = h*c*B

[tex]6.626*10^{(-34)} J*S*3*10^{(10)} cm/s*2.118*10^{(10)} 1/cm[/tex]

[tex]B=42.06 \times 10^{(-24)}J[/tex]

Now according to relation

[tex]B=\frac{h^2}{8\pi^2 I}[/tex]

where I is moment of inertia

[tex]I=\frac{h^2}{8\pi^2 B}[/tex]

[tex]=(6.62*10^{(-34)})^2(JS)^2/8*(3.14)^2*(42.06*10^{(-24)})\\\\= 13.20*10^{(-47)}[/tex]

Calculate,

[tex]K=\frac{7.0160*34.968}{7.0160+34.9688} /\frac{10^{(-3)}kg/mol}{6.022*10^{(23)} mol^{(-1)}}[/tex]

[tex]= 0.970*10^{(-26)}kg[/tex]

[tex]I = \mu r^2 \\\\I=\sqrt{\frac{I}{\mu} }[/tex]

[tex]I=\sqrt{\frac{13.20\times 10^{-47 kg\ mx^2}}{0.970\times 10^{-26}kg} }[/tex]

[tex]r=1.166\times 10^{(-10)}[/tex]

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Note that the volume of the smaller cone is Vs = 900cm³

We must use the formula for the volume of a cone in this prompt.

V = (1/3) x   π x r ² x h

Let's assume that the radius of the bigger cone is R, and the radius of the smaller   cone is r.

Since the cones are similar, we knw that the ratio of the heights is the same as the ratio of  the radii

8 / 4 = R / r

Simplifying this equation, we can state

2 = R / r

This is also

R = 2r

So substituting into the expression for the bigger cone we say

Vb = (1/3) x π x (2r)² x 8

(1/3) x π x (2r)² x 8= 3600
8.37758040957 x (2r)² = 3600

2r² = 3600/8.37758040957

2r² = 429.718346348

r² = 214.859173174

r = 14.6580753571

So we can now enter tis into the expression for the smaller volume:

Vs = (1/3) x pi x 14.6580753571² x4

Vs = (1/3) x 3.14159265359 x 214.85917317442229252041 x4

Vs = 900cm³

So we are correct to state that the volume of the smaller cone is 900cm³

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(a) P-value for z₀=1.88 is 0.0614

(b) P-value for z₀=−1.92 is 0.0548

(c) P-value for  z₀=0.43 is 0.6672

Assuming a two-tailed test with a significance level of α=0.05, we can calculate the P-value for each test statistic using the standard normal distribution

(a) z₀=1.88

P-value = P(Z > 1.88) + P(Z < -1.88)

= 2 × (1 - P(Z < 1.88))

= 2 × (1 - 0.9693)

= 0.0614

(b) z₀=−1.92

P-value = P(Z < -1.92) + P(Z > 1.92)

= 2 × (1 - P(Z < 1.92))

= 2 × (1 - 0.9726)

Do the arithmetic operation

= 0.0548

(c) z₀=0.43

P-value = P(Z > 0.43) + P(Z < -0.43)

= 2 × (1 - P(Z < 0.43))

= 2 × (1 - 0.6664)

= 0.6672

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According to given information, the ratio of white keys to black keys is 5:2.

In mathematics, a ratio is a comparison of two quantities or values. It expresses how many times one quantity is contained in another. Ratios can be written in the form of a fraction, using a colon, or using the word "to".

The ratio of black keys to white keys is 6:15. To find the ratio of white keys to black keys, we can write the same ratio in terms of white keys first, then simplify it.

The ratio of white keys to black keys can be found by inverting the ratio of black keys to white keys, which gives:

15:6

We can simplify this ratio by dividing both the numerator and denominator by the greatest common factor, which is 3. Dividing by 3 gives:

5:2

Therefore, the ratio of white keys to black keys is 5:2.

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Answer:

b. The outlier in the data set is the shoe priced at $78.95.

c. The outlier affects the mean by pulling it upward since it is much larger than the other prices. The median is not as affected since it is the middle value in the ordered data set, but it is still slightly shifted to the right. The mode is not affected since none of the prices are repeated.

d. Without the outlier, the median is the best measure of center because it is not as affected by extreme values as the mean, and the data set is not symmetric enough to have a clear mode. With the outlier, the median is still a good measure of center, but the mean is not as reliable due to the impact of the outlier.

The signal x[n] is:  x[n] = 19 cos((pi/5)n - pi/2).

The numerical values for A, B, and C are:

A = [tex]sqrt(2 * a0^2 - a5^2)[/tex]

B = [tex]2 * pi / N[/tex]

C = [tex]arctan((a5 / sqrt(2 * a0^2 - a5^2)) / tan(5 * pi / N))[/tex]

The given information about the signal x[n] can be used to find the constants A, B, and C in the representation of x[n] as:

x[n] = A cos(Bn + C)

where A, B, and C are constants. We have:

x[n] is a real and even signal with period N=10

The Fourier coefficient a0 is 11

The Fourier coefficient a5 is 5

The energy of x[n] is 50

The numerical values for A, B, and C can be found as follows:

A = [tex]sqrt(2 * a0^2 - a5^2) = sqrt(2 * 11^2 - 5^2)[/tex] = 19

B = [tex]2 * pi / N[/tex] = pi / 5

C = [tex]-arctan(a5 / sqrt(2 * a0^2 - a5^2)) = -arctan(5 / sqrt(2 * 11^2 - 5^2)) = -pi/2[/tex]

Therefore, the signal x[n] can be represented as:

x[n] = 19 cos((pi/5)n - pi/2)

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Answer:

A = £5,306.04 (rounded to the nearest penny)Therefore, the value of the investment at the end of 3 years, with compound interest at a rate of 2% per year, is £5,306.04.

Step-by-step explanation:

We can use the formula for compound interest to calculate the value of the investment at the end of 3 years:A = P(1 + r/n)^(nt)where:

A = the amount after 3 years

P = the principal amount (the initial investment)

r = the annual interest rate (as a decimal)

n = the number of times the interest is compounded per year

t = the number of yearsIn this case:

P = £5000

r = 0.02 (2% as a decimal)

n = 1 (compounded annually)

t = 3Plugging these values into the formula, we get:A = 5000(1 + 0.02/1)^(1*3)

A = 5000(1.02)^3

A = 5000(1.061208)

A = £5,306.04 (rounded to the nearest penny)Therefore, the value of the investment at the end of 3 years, with compound interest at a rate of 2% per year, is £5,306.04.

The probability P(a < Y < b) where Y = -ln(1-X), a = 6.86, and b = 4.22, with X being uniformly distributed between 0 and 1, is 0. This is because the given interval is invalid (a > b).

To explain, we first find the Cumulative Distribution Function (CDF) of Y. Since X is uniformly distributed, its probability density function (PDF) is f_X(x) = 1 for 0 ≤ x ≤ 1. Using the change of variables technique, we differentiate y = -ln(1-x) with respect to x, obtaining dy/dx = 1/(1-x). Thus, the PDF of Y is f_Y(y) = f_X(x) * |dx/dy| = 1 * (1-x) for y = -ln(1-x).

Now, we find the CDF of Y, F_Y(y) = P(Y ≤ y) = ∫f_Y(y)dy, and integrate with the limits from -∞ to y. Finally, to find the probability P(a < Y < b), we compute F_Y(b) - F_Y(a). However, since a > b, the interval is invalid and the probability is 0.

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The answer for the given probability is none of the above.

The distribution of sample means follows a normal distribution with a mean equal to the population mean and a standard deviation equal to the population standard deviation divided by the square root of the sample size.

Therefore:

mean = 12 ounces

standard deviation = 0.12 ounces

sample size = 625 cans

sample mean = 11.994 ounces

The z-score for a sample mean of 11.994 ounces is:

z = (sample mean - population mean) / (population standard deviation / sqrt(sample size))

z = (11.994 - 12) / (0.12 / sqrt(625))

z = -2.5

We want to find the probability that the sample mean is less than 11.994 ounces, which is equivalent to finding the area under the standard normal distribution to the left of z = -2.5.

Using a standard normal distribution table or calculator, we find that this probability is approximately 0.0062.

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The data is consistent with the Mendelian expected ratios at a significance level of alpha=0.10.

We must use the 9:3:3:1 ratio to calculate the expected numbers of each type of offspring in order to determine whether the observed data match the Mendelian expected ratios.

According to the 9:3:3:1 ratio, we would expect:

9/16 (56.25%) of the offspring to have white feathers and a small comb

3/16 (18.75%) of the offspring to have white feathers and a large comb

3/16 (18.75%) of the offspring to have dark feathers and a small comb

1/16 (6.25%) of the offspring to have dark feathers and a large comb

Using these expected proportions, we can calculate the expected number of offspring for each category:

Type Expected number Observed number (Expected - Observed)² / Expected

White feathers,  

small comb 106.875                   111                    0.197

White feathers,  

large comb 35.625                     37                         0.056

Dark feathers,  

small comb 35.625                   34                          0.018

Dark feathers,  

large comb 11.25                   8                         1.433

To calculate the chi-square statistic, we sum the last column:

chi-square = 0.197 + 0.056 + 0.018 + 1.433 = 1.704

For this test, the degrees of freedom are (4-1) = 3. The critical value from a chi-square distribution table is 6.251 with a significance level of alpha=0.10 and degrees of freedom of 3. We are unable to reject the null hypothesis that the observed data are in line with the Mendelian expected ratios because our calculated chi-square value (1.704) is lower than the critical value (6.251).

Therefore, based on the chi-square test, the data is consistent with the Mendelian expected ratios at a significance level of alpha=0.10.

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The form of the partial fraction decomposition of the rational expression 7x - 5x/(x²+ 8)² is: (7x - 5) / (x² + 8)² = (Ax + B) / (x²+ 8) + (Cx + D) / (x² + 8)² where A, B, C, and D are constants to be determined.

The expression is:
(7x - 5) / (x² + 8)²

To write the partial fraction decomposition of this expression, we will have two fractions with denominators being the powers of the irreducible quadratic factors. The numerators will have a degree less than the degree of the quadratic factors. In this case, the numerators will be linear expressions.

So, the partial fraction decomposition form for this expression will be:

(7x - 5) / (x² + 8)² = (Ax + B) / (x²+ 8) + (Cx + D) / (x² + 8)²

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Answer:

8862.3 yrds2

Step-by-step explanation:

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