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Musya8 [376]
3 years ago
10

?.4 + 7 = ? +16

Mathematics
1 answer:
mr Goodwill [35]3 years ago
5 0

Answer:

3

Step-by-step explanation:

(? * 4) + 7  = ? + 16

-?               -? (subtract a "?" on both sides)

4? - ? + 7 = 16

3? + 7 = 16

     -7     -7 (subtract 7 on both sides)

3? = 9

/3 /3 (divide by 3 on both sides)

? = 3

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enyata [817]

Let f(x)=\tan^{-1}x. Then f'(x)=\frac1{1+x^2}. Note that f(0)=0.

Recall that for |x|, we have

\displaystyle\frac1{1-x}=\sum_{n\ge0}x^n

This means that for |-x^2|=|x|^2, or -1, we have

\displaystyle f'(x)=\frac1{1+x^2}=\frac1{1-(-x^2)}=\sum_{n\ge0}(-x^2)^n=\sum_{n\ge0}(-1)^nx^{2n}

Integrate the series to get

f(x)=f(0)+\displaystyle\sum_{n\ge0}\frac{(-1)^n}{2n+1}x^{2n+1}

\implies\tan^{-1}x=\displaystyle\sum_{n\ge0}\frac{(-1)^n}{2n+1}x^{2n+1}

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3 years ago
Please help me on these two questions
irina [24]

Answer:A for the first one and C for the second one

Step-by-step explanation:

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3 years ago
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hodyreva [135]

Answer:

C) 33 meters

Step-by-step explanation:

In this question, we need to find the value of the variable "x".

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Answer:

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Step-by-step explanation:

The opposite is the negative value

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