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2 years ago

4* - 5(2) + 4 = 0, u = 2 [Note: 4* = (2*)^2 Use the substitution given

Mathematics

1 answer:

KengaRu [80]2 years ago

5 0

Answer:

x = 0, 2

Step-by-step explanation:

${4}^{x} - 5( {2}^{x} ) + 4 = 0 \\ {({2}^{x})}^{2} - 5( {2}^{x} ) + 4 = 0 \\ {u}^{2} - 5u + 4 = 0 \\ (u - 1)(u - 4) = 0 \\ u = 1 \: or \: u = 4 \\ {2}^{x} = 1 \: or \: {2}^{x} = 4 = {2}^{2} \\ x = 0 \: or \: x = 2$

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How many pairwise comparisons must you make for a case with 15 statistically independent scenarios?

Levart [38]

There are 105 comparisons made with 15 statistically independent scenarios.

According to the statement

we have given value of n is 15.

Then r = 2. so,

we use the formula NcR then

Substitute the values in it then

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we open it according to ncr formula

In this formula we arrange the terms according to the following

NcR formula = n! /r! * (n-r)!

then the terms will arrange in this way.

So,

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After solving the statement some terms will be cancel with each other and remaining terms are

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here the value becomes 105.

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Ksju [112]

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Step-by-step explanation:

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3 years ago

4* - 5(2*) + 4 = 0, u = 2* [Note: 4* = (2*)^2 Use the substitution given

4* - 5(2) + 4 = 0, u = 2 [Note: 4* = (2*)^2 Use the substitution given