1.

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

Answer»

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

ANSWER :A


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