Using the derivative of f(x) given below, determine the intervals on which f(x) is increasing or decreasing.f'(x) = (3 - x)(7 - x)
A. Decreasing on (-?, 3); increasing on (7, ?)
B. Decreasing on (-?, 3) ? (7, ?); increasing on (3, 7)
C. Decreasing on (-?, -3) ? (-7, ?); increasing on (-3, -7)
D. Decreasing on (3, 7); increasing on (-?, 3) ? (7, ?)
Answer: D
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B.
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