Given f(x)=x2−4x+4f(x) = x^2 - 4x + 4f(x)=x2−4x+4, find the interval of xxx such that f(f(x))=xf(f(x)) = xf(f(x))=x.
x=1,2,3x = 1, 2, 3x=1,2,3
x=1,3x = 1, 3x=1,3
x=2x = 2x=2
None of the above