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If f : [1, oo) rarr [2, oo) is given by ...

If `f : [1, oo) rarr [2, oo)` is given by `f(x) = x + (1)/(x)` then `f^(-1)` (x) equals:

A

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

B

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

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
A
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