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The function f(x) = 2x^3 - 9x^2 + 12x + 1 is increasing on
Ax < 1 or x > 2
B1 < x < 2
Cx > 1 only
Dx < 2 only
Answer & Solution
Correct answer: A. x < 1 or x > 2
f'(x) = 6(x - 1)(x - 2) is positive for x below 1 and for x above 2.
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