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Math Help - Need help finding the derivative.

  1. #1
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    Need help finding the derivative.

    I need to find the Derivative of

    f(x)= x+1/x^2

    Can I do this? x=1/x^2= x-x^2=-x^2+x=f'(x)= -2x+1
    Thanks

    Jason
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  2. #2
    MHF Contributor Amer's Avatar
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    Quote Originally Posted by Darkhrse99 View Post
    I need to find the Derivative of

    f(x)= x+1/x^2


    Thanks

    Jason
    f(x) = x + x^{-2}

    f'(x)=1 +(-2)x^{-2-1}=1-2x^{-3}
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  3. #3
    Super Member craig's Avatar
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    Quote Originally Posted by Darkhrse99 View Post
    I need to find the Derivative of

    f(x)= x+1/x^2


    Thanks

    Jason
    You can write this as f(x)= x + x^{-2}

    Using your normal differential rules this gives you f'(x)= 1 - 2x^{-3}
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  4. #4
    Super Member craig's Avatar
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    Quote Originally Posted by Amer View Post
    f(x) = x + x^{-2}

    f'(x)=1 +(-2)x^{-2-1}=1-2x^{-3}
    Just beat me to it
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