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Using the first derivative, find the interval(s) for which f(x) is increasing and decreasing. f(x) = 12 + 9x - 3x2 -x3 increasing: decreasing: O

Using the first derivative, find the interval(s) for which f(x) is increasing and decreasing. f(x) = 12 + 9x - 3x2 -x3 increasing: decreasing: O (-00,-3] U [1,00) O (-3, 1) O (- 0, - 3) U (1,00 ) O (-00,-3]

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