If for every in the interval

MATHEMATICS · Single correct · A Level · Mathematics · Differentiation · Differentiation

Problem

If f′(x)<0f'(x)<0 for every xx in the interval (1,4)(1,4), then on (1,4)(1,4) the function ff is (a) ff is constant on (1,4)(1,4) (b) ff has a local maximum in (1,4)(1,4) (c) ff is decreasing on (1,4)(1,4) (d) ff is increasing on (1,4)(1,4)

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