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

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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