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If 2f(x) = f(xy) + f(x/y)  for all x, y  R+, f(1) = 0 and f '(1) = 1, then 

(A) f(e) = 1 

(B) f '(e) = 1 

(C) f '(2) = 1/2

(D) f(2) = 1/2  

1 Answer

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Best answer

Correct option (A) (C)

Explanation:

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