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The inverse of function f:R rarr { x in...

The inverse of function `f:R rarr { x in R : x lt 1}` given by` f(x) = (e^x-e^-x)/(e^x+e^-x)` is

A

`1/2log((1+x)/(1-x))`

B

`1/2log((2+x)/(2-x))`

C

`1/2log((1-x)/(1+x))`

D

none of these

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The correct Answer is:
A
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