If f(x) = 3x4 + 4x³ – 12x² + 12, then f(x) is (1) increasing in (-∞, - 2) and in (0, 1) (2) increasing in (-2, 0) and in (1, 0) (3) decreasing in (-2, 0) and in (0, 1) (4) decreasing in (-∞, -2) and in (1, ∞)

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