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college algebra

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for the function f(x)=7/x+6, find the average rate of change of f from 1 to x.

  • college algebra -

    f(x) - f(1)
    ------------
    x-1

    7/(x+6) - 1
    -------------
    x-1

    7 - (x+6)
    -----------
    (x-1)(x+6)

    1-x
    --------------
    (x-1)(x+6)

    -1/(x+6)

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