A twice-differentiable function satisfies and

MATHEMATICS · Subjective · A Level · Mathematics · Differentiation · Differentiation

Problem

A twice-differentiable function ff satisfies f′(a)=0f'(a)=0 and f′′(a)=0f''(a)=0. Explain in one or two sentences why no conclusion about a relative extremum at x=ax=a can be drawn from this information alone.

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