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Extrema: First Derivative Test

AP Calculus AB· difficulty 1/5

A critical point of ff is a value of xx in the domain where

  • A

    f(x)=0f(x) = 0

  • B

    f′′(x)=0f''(x) = 0

  • C

    ff is increasing

  • D

    f′(x)=0f'(x) = 0 or f′(x)f'(x) undefined

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Explanation

Critical points: derivative is zero or undefined (interior of domain).

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