1.

The interval on which the function f(x) = 2x3 + 9x2 + 12x - 1 is decreasing is (a) [-1, ∞) (b) [-2, -1] (c) (∞, -2] (d) [-1, 1]

Answer»

The interval on which the function f(x) = 2x3 + 9x2 + 12x - 1 is decreasing is

(a) [-1, ∞) (b) [-2, -1] (c) (∞, -2] (d) [-1, 1]



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