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If f(x)=x+tanx and g(x) is the invers...

If `f(x)=x+tanx and g(x) is the `inverse` of `f(x)`, then `differentiation of g(x)` is (a)`1/(1+[g(x)-x]^2)` `(b) 1/(2-[g(x)+x]^2)` `(c)1/(2+[g(x)-x]^2)` `(d) none of these`

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