3. For the given function f (x) = 2x2+5x-12 ; 4x2 -9 , identify where the function is continuous. Also classify each discontinuity as removable discontinuity, jump discontinuity, or infinite discontinuity. (In classifying the type of discontinuity, use limits to explain why.) 4. a. Evaluate the one-sided limits by explaining why infinite and determining sign of infinity lim - x- 6 x - 2 X-3-9-x2 lim - x-2+x2-4x+4