pre-calculus--Please help, urgent.

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For the function f(x)= 8/x+7,find the average rate of change of f from 1 to x.

  • pre-calculus--Please help, urgent. -

    Did you mean
    f(x) = 8/(x+7)

    then f(1) = 8/8 = 1

    avg rate of change = (f(x) - f(1) )/(x-1)
    = (8/(x+7) - 1)/(x-1)
    = ( (8 - x - 7)/(x+7) )/(x-1)
    = ( (1-x)/x+7) )/(x-1)
    = -1/(x+7)

  • pre-calculus--Please help, urgent. -

    thank you so much!!

  • pre-calculus--Please help, urgent. -

    You are welcome.

    (I have just answered 13 questions this morning, and you are the only one to say thank you or acknowledge the answer, much appreciated)

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