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3 years ago

If the zeroes of the polynomial x^3-3x^2+x+1 are a-b,a,a+b find a and b

Mathematics

1 answer:

disa [49]3 years ago

5 0

Answer:

Duplicate Question

brainly.com/question/12434722

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Fill in the blanks with two consecutive integers to complete the following inequality.

Alona [7]

Sqrt of 56 is about 7.5

So 6 would be in the first blank and 8 would be in the second blank.

6,7,8 are consecutive

7 0

3 years ago

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Let X be a Bernoulli rv with pmf as in Example 3.18. a. Compute E(X2 ). b. Show that V(X) 5 p(1 2 p). c. Compute E(X79).

spayn [35]

The Bernoulli distribution is a distribution whose random variable can only take 0 or 1

The value of E(x2) is p
The value of V(x) is p(1 - p)
The value of E(x79) is p

<h3>How to compute E(x2)</h3>

The distribution is given as:

p(0) = 1 - p

p(1) = p

The expected value of x2, E(x2) is calculated as:

$E(x^2) = \sum x^2 * P(x)$

So, we have:

$E(x^2) = 0^2 * (1- p) + 1^2 * p$

Evaluate the exponents

$E(x^2) = 0 * (1- p) + 1 * p$

Multiply

$E(x^2) = 0 +p$

Add

$E(x^2) = p$

Hence, the value of E(x2) is p

<h3>How to compute V(x)</h3>

This is calculated as:

$V(x) = E(x^2) - (E(x))^2$

Start by calculating E(x) using:

$E(x) = \sum x * P(x)$

So, we have:

$E(x) = 0 * (1- p) + 1 * p$

$E(x) = p$

Recall that:

$V(x) = E(x^2) - (E(x))^2$

So, we have:

$V(x) = p - p^2$

Factor out p

$V(x) = p(1 - p)$

Hence, the value of V(x) is p(1 - p)

<h3>How to compute E(x79)</h3>

The expected value of x79, E(x79) is calculated as:

$E(x^{79}) = \sum x^{79} * P(x)$

So, we have:

$E(x^{79}) = 0^{79} * (1- p) + 1^{79} * p$

Evaluate the exponents

$E(x^{79}) = 0 * (1- p) + 1 * p$

Multiply

$E(x^{79}) = 0 + p$

Add

$E(x^{79}) = p$

Hence, the value of E(x79) is p

Read more about probability distribution at:

brainly.com/question/15246027

5 0

2 years ago

!!!Factor each completely, please

frez [133]

1. (x + 7) (x + 8)

2. - (20x - 77)

3. 3 (2x +7)

4. 79x - 3

5. 4 (24x -1)

6. (4x - 5) (2x + 5)

7. (x-4) (x + 9)

8. 2 (x + 4) (x + 6)

5 0

2 years ago

Select the phrase that best completes the sentence.

muminat

Answer:

No solution

Step-by-step explanation:

3 0

3 years ago

Evaluate 10m+n/4 wnen m=5 and n=16

solmaris [256]

Hi!

Let's put the values in the equation.

10 · 5 + 16 ÷ 4 = ?

Using PEMDAS...

Multiplication
50 + 16 ÷ 4 = ?

Division
50 + 4 = ?

Addition
54

The answer is 54

Hope this helps! :)

4 0

3 years ago

Read 2 more answers