If (f∘g)(x)=x(f \circ g)(x) = x(f∘g)(x)=x and g(x)=2xg(x) = 2xg(x)=2x, what is f(x)f(x)f(x)?
f(x)=x2f(x) = x^2f(x)=x2
f(x)=2xf(x) = 2xf(x)=2x
f(x)=x2f(x) = \frac{x}{2}f(x)=2x
f(x)=x−2f(x) = x - 2f(x)=x−2