1. Find the limit by direct substitution if it exists. lim x (x - 1)2 a. lim (x - x + 5) b. x- 2 lim (x - 4)23 C. x-2 lim (e* sin x) d. 2. Explain why you cannot use substitution to find the limit and find the limit algebraically if it exists. x2 - 9 lim -3x2 + 2x - 15 3. Use the graph to find the limits or to explain why the limits do not exist. (a) lim f(x) (b) lim f(x) (e) lim f(x) 0 1234