Q .     Inverse of function `f(x)=(10^x-10^(-x))/(10^x+10^(-x))` i s

UPSEE 2010
A

`log_10 (2-x)`

B

`1/2 log_10 ((1+x)/(1-x))`

C

`1/2 log_10 (2x-1)`

D

`1/4 log_10 (2x)/(2-x)`

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