Let f : ? be such that f is injective and f(x)f(y) = f(x +y) for all x, y ? . If f(x), f(y), f(z) are in G.P., then x, y, z are in
(A) A.P. always
(B) G.P. always
(C) A.P. depending on the values of x, y, z (D) G.P. depending on the values of x, y, z
aniket anand , 11 Years ago
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