1. Evaluate: lim cos(x)-1 X 2. Evaluate: lim 12-t-6 t-3t2-41+3 3. Evaluate: lim + x-1x-1 r3-1r+2 x , for x s 1 4. Let f( x) = (2x + 1, for x > 1' Is f continuous at x = 1? If so, explain your answer. If not, explain why not and specify the type of discontinuity (removable, jump, infinite)