4. For each of the following, find the limit, if it exists. (m is a positive integer) [points 10] (a). lim (2x + 4x3 + 2) {bj. lim (2x3 - 4x + 2) 1+x-x (c). lim 1+x2 x' - 2x + 1 {d). lim K' - x {e). lim - 1 x - 11. For each of the following, find the limit if it exists. [points 10] 2 {a). lim x3 - 1 (b). lim (x- x-4) (c). lim 10-x 2x + 4x-+ 2 (d). lim reg*' - 10r + 2x + 2 2. For each of the following, find the limit if it exists. [points 12] (a). lim (x - 2 + 1) x42+ (b). lim 1 x43 + VX- 3 (c). lim X+0+ 3. For each of the following, find the limit if it exists. [points 12] (a). lim cos *+0- (b). lim (10 + x + 53) *+0 + (c). lim (10 + x+53) 1+0