Question: Graph f(x) = -0.25x 4 +0.67x 3 + 9.5x 2 - 20x - 50. (a) Approximate any local extrema. (b) Approximate any absolute extrema. (c)

Graph f(x) = -0.25x4 +0.67x3 + 9.5x2 - 20x - 50. 

(a) Approximate any local extrema. 

(b) Approximate any absolute extrema. 

(c) Determine where f is increasing or decreasing.

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