Given f(x)=x2−9x2−2x−3f(x) = \frac{x^2-9}{x^2-2x-3}f(x)=x2−2x−3x2−9, what type of discontinuities exist at x=3x=3x=3 and x=−1x=-1x=−1?
Removable at x=3x=3x=3, Vertical at x=−1x=-1x=−1
Vertical at x=3x=3x=3, Removable at x=−1x=-1x=−1
Removable at both
Vertical at both