Extrema: First Derivative Test

AP Calculus AB· difficulty 2/5

On this hill-shaped graph, f(x)f'(x) is negative

  • A

    Nowhere

  • B

    On the left half

  • C

    On the right half

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  • D

    At the peak only

Explanation

The function is decreasing on the right side → f<0f' < 0 there.

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