Math 180 2.5 Show all your work. Name Last, First 1) (9 points) Use formal definition of continuity to prove that f(x) = 5x2 +12x -9 is continuous at 7.3. (1 1 points) Find the limits. x+2 if x 1 a) lim f (x) x - 1+ lim f (x) b) * - 0+ c) lim f(x) d) lim f (x) x-4