x-3 5. For what values of x will the function, f(x) = be discontinuous? x3+3x2-18x a) -6, 0 b) -6, -3, 0 c) -6, 0, 3 d) -3, 0, 6 True or False: [4 Marks] 6. If the limit exists at x = a then the function is continuous at x = a. 7. A removable discontinuity is the only discontinuity in which the limit exists. 8. A cusp is not a discontinuity but does result in the derivative not existing. 9. The reason we use the limit as h-+0 to find the slope is because A x -0 1