Question: 19. Determine the intervals for which the function is increasing and decreasing. f(x) = - 4 c 20. Locate and classify the extrema for the

19. Determine the intervals for which the function is increasing and decreasing. f(x) = - 4 c 20. Locate and classify the extrema for the graph of y = x4 - 3x2 +2 C 21. Find the average rate of change for g(x) =-3x3 - 4x on the interval [2.6] C

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