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Math Help - differenciate

  1. #1
    Newbie
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    Sep 2007
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    differenciate

    Hi,

    I'm having a difficulity with my homework, how do I:

    Differentiate: 2/x^2
    Differentiate: √x^5
    Expand: (x+ 2/x)^2

    Can anybody help please?

    Many Thanks
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  2. #2
    MHF Contributor red_dog's Avatar
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    Medgidia, Romania
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    \displaystyle \frac{2}{x^2}=2x^{-2}
    \displaystyle\sqrt{x^5}=x^{\frac{5}{2}}
    \displaystyle \left(x+\frac{2}{x}\right)^2=x^2+4+4x^{-2}
    In all cases use (x^a)'=ax^{a-1}
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  3. #3
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    Thats brilliant, Thankyou very much
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