If f(x)=x^2 and x is an integer, which of the following CANNOT be the value of f(f(x))?
Pick one:
A) 144  B) 16  C) 81  D) 1  E) 256
f(x)=x^2   f(f(x)) = (x^2)^2   =x^4   D. 1 , x=1   B. 16 , x=2   C. 81 , x=3   A. 144   f(x)=12   Square root of 12 is not a positive integer . Hence 144 can not be the value of f(f(x)) .   E. 256 , x=4   144nswer 144
<result>A</result>
If f(x)=x^2 and x is an integer, which of the following CANNOT be the value of f(f(x))?