Let f(x) = x³ + 9x² - 48x + 21. (a) Use the definition of a derivative or the derivative rules to find f'(x) = (b) Use t

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Let F X X 9x 48x 21 A Use The Definition Of A Derivative Or The Derivative Rules To Find F X B Use T 1 (49.01 KiB) Viewed 29 times

Let f(x) = x³ + 9x² - 48x + 21. (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 =