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Math Help - I can't solve Simple algebra problem

  1. #1
    Junior Member Cyberman86's Avatar
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    Question I can't solve Simple algebra problem

    I know I'm in calculus but sometimes the algebra kills me.

    This is about finding the absolute maximum and minimum. endpoints
    X=-8 and x=1

    F(x)=x^4/3
    f(-8)=(-8)^4/3
    f(-8)= ???
    How do i solve this step by step,i tried the calculator but its not giving me the right answer, my mathlab says its wrong.


    This is an example from my mathlab

    F(x)=x^8/3
    f(-8)=(-8)^8/3
    f(-8)= 256 (I don't know how they got that)
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  2. #2
    MHF Contributor
    skeeter's Avatar
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    Quote Originally Posted by Cyberman86 View Post
    I know I'm in calculus but sometimes the algebra kills me.

    This is about finding the absolute maximum and minimum. endpoints
    X=-8 and x=1

    F(x)=x^4/3
    f(-8)=(-8)^4/3
    f(-8)= ???
    How do i solve this step by step,i tried the calculator but its not giving me the right answer, my mathlab says its wrong.


    This is an example from my mathlab
    F(x)=x^8/3
    f(-8)=(-8)^8/3
    f(-8)= 256 (I don't know how they got that)
    (-8)^{\frac{4}{3}} = [(-8)^{\frac{1}{3}}]^4 = (-2)^4 = 16
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  3. #3
    Junior Member Cyberman86's Avatar
    Joined
    Jul 2008
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    san antonio Tx
    Posts
    27
    Thanks a lot
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