6. (5 points) Consider the function f defined as f (x) = x cos(x) + V2x +1. (a) Compute the derivative of f. (b) Find an equation for the tangent line to the graph of y = f(x) at x = 0.7. (5 points) Below is a graph of f (x). 4 7 N CO 1 . -2-1 1 2 3 4 5 6 7 8 9 -1 -3 (a) State all x-values where f is continuous but not differentiable. (b) State an x-value where f has an inflection point. (c) Compute lim f(x). (d) State an x-value where f has a local minimum. (e) State an x-value where f has an absolute maximum on [-2, 9]