Previous Problem Problem List Next Problem (1 point) A function f (a) is said to have a jump discontinuity at x = a if: 1. lim f(x) exists. 2. lim f(x) exists. 3. The left and right limits are not equal. x2 + 2x +7, ifx 4 Show that f (a) has a jump discontinuity at a = 4 by calculating the limits from the left and right at x = 4. lim f(x) = I. lim f(x) = Now for fun, try to graph f ( a)