The table below lists selected values of the first derivative of a differentiable function

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

Problem

The table below lists selected values of the first derivative of a differentiable function ff. x02468x\quad 0\quad 2\quad 4\quad 6\quad 8 f′(x)++0−−f'(x)\quad +\quad +\quad 0\quad -\quad - On which open interval shown is ff most clearly decreasing? (a) (2,4)(2,4) (b) (4,6)(4,6) (c) (6,8)(6,8) (d) (0,2)(0,2)

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