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Let f(x) = x105 + x53 + x27 + x13 + x3 + 3x + 1. If g(x) is inverse of function f(x), then the value of g'(1) is 

(A) 3 

(B)1/3

(C) – 1/3

(D) not defined

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Correct Option:- (B) 1/3

Explanation :-

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