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

Let f : `R rarr R` be such that f is injective and `f(x) f(y ) = f(x+ y)forall x,y in` R. 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

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The correct Answer is:

A

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