1.

If f(x-y),f(x)*f(y),f(x+y) are in for all x,y in R " and " f(0) ne 0, then

Answer»

F'(X) is an even function
f'(1)+f'(-1)=0
f'(2)-f'(-2)=0
f'(3)+f'(-3)=0

Answer :B::D


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