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
Correct Option:- (B) 1/3
Explanation :-