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

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

A

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

B

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

C

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

D

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

Text Solution

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The correct Answer is:
A
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