3 years ago

What percent is 15 out of 75

Mathematics

1 answer:

son4ous [18]3 years ago

7 0

15/75×100%
=1/5×100%
=20%

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photoshop1234 [79]

Substitute $u=x^2+4$ and $du=2x\,dx$ . Then the integral transforms to

$\displaystyle \int \frac{x\,dx}{(x^2+4)^3} = \frac12 \int \frac{du}{u^3}$

Apply the power rule.

$\displaystyle \int \frac{du}{u^3} = -\dfrac1{2u^2} + C$

Now put the result back in terms of $x$ .

$\displaystyle \int \frac{x\,dx}{(x^2+4)^3} = \frac12 \left(-\dfrac1{2u^2} + C\right) = -\dfrac1{4u^2} + C = \boxed{-\dfrac1{4(x^2+4)^2} + C}$

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Step-by-step explanation:

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Zielflug [23.3K]

Answer:

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Step-by-step explanation:

their the same length so plug em equal to each other

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