Question

6. In all of this question let y=h(x) = x + 2x – 1. (a) Find the intervals where h is (i) increasing/decreasing and (ii) concave up/down. [6 points] (b) Find all relative extrema and point(s) of inflection of h. Sufficiently justify your answer. [4 points) (c) Give an accurate, labeled sketch of the graph of y=h(). Be sure to include all features you found in Parts (a) and (b). [6 points)