Which of the following describes the behavior of f(x)=x2−4x2−5x+6f(x) = \frac{x^2 - 4}{x^2 - 5x + 6}f(x)=x2−5x+6x2−4 as x→2x \to 2x→2?
The limit exists and is 4.
There is a vertical asymptote.
The limit exists and is -4.
The function approaches infinity.