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If f:[1,oo)to[1,oo) is given by f(x)=x+(...

If `f:[1,oo)to[1,oo)` is given by `f(x)=x+(1)/(x)`, then `f^(-1)(x)` equals :

A

`(x+sqrt(x^(2)-4))/(2)`

B

`(x-sqrt(x^(2)-4))/(2)`

C

`1+sqrt(x^(2)-4)`

D

`(x)/(1+x^2)`

Text Solution

Verified by Experts

The correct Answer is:
A
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