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int (1)/((1+e^(x))(1+e^(-x))) dx=...

`int (1)/((1+e^(x))(1+e^(-x))) dx=`

A

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

B

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

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
A
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