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Let f: R rarr R be such that f is inject...

Let `f: R rarr R` be such that f is injective and `f(x)f(y)=f(x+y)` for `AA x,yinR`. If f(x), f(y), (fz) are in G.P. then x, y, z are in

A

A.P always

B

G.P always

C

A.P depending on the value of x, y, z

D

G.P depending on the vallue of x, y, z

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