1.

If f(x)=(e^(x)+e^(-x))/(2) then the inverse of f(x) is

Answer»

`log_(e)(X + sqrt(x^(2)+1))`
`log_(e)sqrt(x^(2)+1)`
`log_(e)(x + sqrt(x^(2)-1))`
`log_(e) ( x-sqrt(x^(2)-1))`

ANSWER :C


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