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int(dx)/((e^(x)+e^(-x))^(2))=...

`int(dx)/((e^(x)+e^(-x))^(2))=`

A

`1(1)/(2(e^(2x) + 1))+c`

B

`-1(1)/(2(e^(2x) + 1))+c`

C

`-1(1)/(3(e^(2x) + 1))+c`

D

`-1(1)/((e^(2x) + 1))+c`

Text Solution

Verified by Experts

The correct Answer is:
B
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