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The inverse of the functions f(x)=log(2)...

The inverse of the functions `f(x)=log_(2)(x+sqrt(x^(2)+1))` is

A

`(1)/(2) (a^(x)- a^(-x))`

B

not defined for all x

C

defined for `x gt 0`

D

none of these

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The correct Answer is:
A
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