2 years ago

NEED HELP ASAP!!!

1 answer:

Kay [80]2 years ago

6 0

A

sorry if its wrong looks reasonable

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Leokris [45]

answer; you

Step-by-step explanation:

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2 years ago

ANEK [815]

According to a calculator, this is the answer: 0.1923076923. Hope this helped?

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2 years ago

kykrilka [37]

Pretty sure is A or D.

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2 years ago

stich3 [128]

Answer:

Step-by-step explanation:

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2 years ago

Montano1993 [528]

$f'(x)=\dfrac{4x}{1+7x^2}$

Integrating gives

$f(x)=\displaystyle\int\frac{4x}{1+7x^2}\,\mathrm dx$

To compute the integral, substitute $u=1+7x^2$ , so that $\frac27\,\mathrm du=4x\,\mathrm dx$ . Then

$f(x)=\displaystyle\frac27\int\frac{\mathrm du}u=\frac27\ln|u|+C$

Since $u=1+7x^2>0$ for all $x$ , we can drop the absolute value, so we end up with

$f(x)=\dfrac27\ln(1+7x^2)+C$

Given that $f(0)=10$ , we have

$10=\dfrac27\ln1+C\implies C=10$

so that

$\boxed{f(x)=\dfrac27\ln(1+7x^2)+10}$

7 0

3 years ago