Which of the following has a hole at x=2x = 2x=2?
f(x)=xx−2f(x) = \frac{x}{x-2}f(x)=x−2x
f(x)=x−2x+2f(x) = \frac{x-2}{x+2}f(x)=x+2x−2
f(x)=1x−2f(x) = \frac{1}{x-2}f(x)=x−21
f(x)=x2−4x−2f(x) = \frac{x^2-4}{x-2}f(x)=x−2x2−4