Course Messages Forums Calendar Gradebook Home > MAT201.5958 Spring 1, 2022 > Assessment HW 14 Derivatives and the shape of a graph Score: 6.74/15 6/15 answered User Settings Log Out Question 13 Let f(x) < > = x3+9x-48x +3. (a) Use the definition of a derivative or the derivative rules to find f'(x): (b) Use the definition of a derivative or the derivative rules to find f''(x) = (c) On what interval(s) is f increasing? I: (d) On what interval(s) is f decreasing? I: (e) On what interval(s) is f concave downward? 2: (f) On what interval(s) is f concave upward? I: Question Help: Video Message instructor Submit Question