1.

If f(x) and g(x)are two functions with g(x) = x -1/x and fog (x) = x^3 -x/x^3 then f^(1)(x)=

Answer»

`x^2-1/x^2`
`x^2+1/x^2`
`3(x^2+1)`
`3x^2+3//x^4`

ANSWER :C


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