nahid78 wrote:
If x>0, does f(x^2)=f(x)^2?
(1) f(x) = √x
(2) x=9
Please solve in details.
Question : does f(x^2)=f(x)^2?Statement 1:f(x) = √x
i.e. f(x)^2 = (√x)^2 = x
and i.e. f(x^2) = √(x^2) = x
i.e. f(x^2)=f(x)^2
SUFFICIENT
Statement 2:x=9But we do NOT have the function to solve and check what question expects us to check hence
NOT SUFFICIENT
Answer: option A
nahid78 : Please post DS question in DS forum
Bunuel : Please shift the question in DS forum
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