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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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