Question: Let f(x) be a function whose domain is (-1, 1). If f'(x) = x(x - 1) (x + 1), then f (x ) is decreasing

Let f(x) be a function whose domain is (-1, 1). If f'(x) = x(x - 1) (x + 1), then f (x ) is decreasing on the interval O A. 2 O B. (0, 1) O C. f is never decreasing O D. ( - 1, 1) O E. ( - 1, 0)

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