Let f(x) = x³ + 3x² - 9x + 15. (a) Use the definition of a

Last updated: 7/22/2022

Let f(x) = x³ + 3x² - 9x + 15. (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 is f increasing (include the endpoints in the interval)? interval of increasing = (d) On what interval is f decreasing (include the endpoints in the interval)? interval of decreasing = (e) On what interval is f concave downward (include the endpoints in the interval)? interval of downward concavity = (f) On what interval is f concave upward (include the endpoints in the interval)? interval of upward concavity =