11. Determine the intervals on which the function is continuous: 3x -x-2 f(x) = x-1 [2] 10, x=1 12. Evaluate the limit if it exists. [4] lim 2x +x+1 I-4X x+2 13. Differentiate each of the following in the space provided. aj / (x) =-9 [1] c) f (x) = Vx (2] b) f(x) = 2x2 - 10x +5 [2] d) )= Inx* [2]