Which of the following functions has a removable discontinuity at x=2x=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
f(x)=x−2x2−4f(x) = \frac{x-2}{x^2-4}f(x)=x2−4x−2
f(x)=x2−5x+6x−2f(x) = \frac{x^2-5x+6}{x-2}f(x)=x−2x2−5x+6