If f(x)=x2f(x) = x^2f(x)=x2 and g(x)=xg(x) = \sqrt{x}g(x)=x, which is true?
f(g(x))=xf(g(x)) = xf(g(x))=x for all x≥0x \geq 0x≥0
g(f(x))=xg(f(x)) = xg(f(x))=x for all xxx
f(g(x))=∣x∣f(g(x)) = |x|f(g(x))=∣x∣
g(f(x))=∣x∣g(f(x)) = |x|g(f(x))=∣x∣