5. (4 marks) Use the definition of derivative to evaluate the following limits. 2a+1 + x - 2 . lim x- 1 lim log3 (2 + 3x + 1) x-+0 6. (4 marks) The tangent line to the graph of function f at x = 0 is given by y = 3x + 2. Find g'(0) if g(x) = f(x) 3f(x)