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Math Help - (fof)(1)

  1. #1
    Newbie Auger's Avatar
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    (fof)(1)

    Let f(x)= 2x^3+1 and g(x)= 3x^2+4 . Find the value of the composite function (fof)(1) and (gog)(0).

    For some reason, I cannot get the answer to the first, although a solution to the first would be great for the second to make sure im doing it correctly.

    Thanks,

    Auger
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  2. #2
    MHF Contributor
    skeeter's Avatar
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    Quote Originally Posted by Auger View Post
    Let f(x)= 2x^3+1 and g(x)= 3x^2+4 . Find the value of the composite function (fof)(1) and (gog)(0).

    For some reason, I cannot get the answer to the first, although a solution to the first would be great for the second to make sure im doing it correctly.

    Thanks,

    Auger
    f[f(x)] = f(2x^3+1) = 2(2x^3+1)^3 + 1
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  3. #3
    Newbie Auger's Avatar
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    Sep 2009
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    thanks. the reason i wasnt getting the correct answer is because i had a squared instead or cubed exponent for the large bracket
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