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If F :[1,\ oo)->[2,\ oo) is given by f(x...

If `F :[1,\ oo)->[2,\ oo)` is given by `f(x)=x+1/x` , then `f^(-1)(x)` equals. `(x+sqrt(x^2-4))/2` (b) `x/(1+x^2)` (c) `(x-sqrt(x^2-4))/2` (d) `1+sqrt(x^2-4)`

A

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

B

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

C

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

D

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

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