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

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

A

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

B

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

C

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

D

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

Verified by Experts

The correct Answer is:

B

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