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7. Let f(x) = 3x³ - x². Assume that f is either increasing or decreasing over the interval (-2,0)

a. Find the average rate of change over the interval [- 2, 0].

B. Is f increasing or decreasing over (-2, 0)? Explain how you know.

7 Let fx 3x x Assume that f is either increasing or decreasing over the interval 20 a Find the average rate of change over the interval 2 0 B Is f increasing o class=

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