Estimating Derivatives at a Point

AP Calculus AB· difficulty 3/5

x f(x)=k

The graph of ff is a horizontal line. Then f(x)f'(x) equals:

  • A

    00

    check_circle
  • B

    kk

  • C

    Undefined

  • D

    11

Explanation

Constant function has zero derivative everywhere.

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