Complete the sentences to describe any points of discontinuity in the function f (x) = startlayout enlarged left-brace first row startfraction x cubed + 27 over x squared minus 9 endfraction , x less-than 9 second row 2 x, x greater-than-or-equal-to 9 endlayout the function has a removable point of discontinuity when x = . the function has infinite discontinuity when x = . the function has jump discontinuity when x = .