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Math Help - Functions

  1. #1
    Junior Member
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    Functions

    If anyone could help me out in this, it would be greatly appreciated

    1. for the given linear function compute the quotient
    [f(x+h) -f(x)]/ h

    where h is constant.

    f(x) = -9x^2 + 12


    this is the exact wording, so if it seems confusing, i dont know how else to put it...thanks....
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  2. #2
    MHF Contributor red_dog's Avatar
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    f(x+h)=-9(x+h)^2+12=-9x^2-18xh-9h^2+12
    \displaystyle\frac{f(x+h)-f(x)}{h}=\frac{-9x^2-18xh-9h^2+12+9x^2-12}{h}=
    \displaystyle=\frac{h(-18x-9h)}{h}=-18x-9h
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  3. #3
    Math Engineering Student
    Krizalid's Avatar
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