1.

If f(x) =(10^(x)-10^(-x))/(10^(x) +10^(-x)) then f^(-1)(x)=

Answer»

`log_(10)(2-x)`
`1/2 log_(10)((1+x)/(1-x))`
`1/2 log_(10) (2X-1)`
`1/4 log_(10)((2x)/(2-x))`

ANSWER :B


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