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2 years ago

F x is a prime number, then x + 1 is not a prime number. A counterexample is x =

Mathematics

2 answers:

Finger [1]2 years ago

7 0

Answer:

A counterexample is x = 3

Step-by-step explanation:

We are given that x is a prime number, and x + 1 is not a prime number. However consider the number 3. We know that 3 is a prime number, as it is present as factors of 1 and itself. However 3 + 1 = 4 - which falls into the category of a composite number, as it can divide into 2 * 2. <u>Therefore your counterexample could be x = 3.</u>

svlad2 [7]2 years ago

3 0

Answer:

x=2

Step-by-step explanation:

x=2

x+1=3

and 3 is a prime

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2 years ago

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Effectus [21]

The z or t score to be used is (0.422,0.978)

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Critical probability (p*) = 1 - (Alpha / 2), where Alpha is equal to 1 - (the confidence level / 100), is the unit statisticians use to determine the margin of error within a set of data in statistics.

The critical value for α = 0.13 is $z_{c} = \frac{z_{1} - \alpha }{2}$

The corresponding confidence interval is computed as shown below

$CI = (X1_{1} - X_{2}- z_{c} \sqrt{\frac{a_{1}^{2}}{n_{1} } + \frac{a_{2}^{2}}{n_{2} }} , X1_{1} - X_{2}+z_{c} \sqrt{\frac{a_{1}^{2}}{n_{1} } + \frac{a_{2}^{2}}{n_{2} }} )$

$CI = (2.1 - 1.4- 1.514\sqrt{\frac{1^{2}}{37 } + \frac{0.5_{2}^{2}}{38 }} , 2.1 - 1.4 + 1.514 \sqrt{\frac{1^{2}}{37 } + \frac{0.5^{2}}{38 }} )$

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To learn more about finding the critical value from the given link

brainly.com/question/14040224

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1 year ago

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Answer:

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Step-by-step explanation:

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The Calculator can confirm.

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3 years ago

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Kobotan [32]

Answer:

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3 years ago

What is the sale price of a hardcover book for which the original retail price was 29.00 and the markdown is 46%?

salantis [7]

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2 years ago

Read 2 more answers