Mathematics Differential Calculus Applications of Derivatives

The function f(x) = (4x3 – 3x2)/6 – 2sin x + (2x – 1)cos x:

1
increases in [1/2, ∞)
2
decreases (-∞, 1/2]
3
increases in (-∞, 1/2]
4
decreases [1/2, ∞)

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