WBJEE 2017 Math Solved Paper

Question : 44 of 75

Marks: +1, -0

Let f : R → R be such that f is injective and f(x) f(y) = f(x+y) for ∀ x, y ∈ R. If f(x), f(y), f(z) are in G.P, then x, y, z are in