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Math Help - differentiation help

  1. #1
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    differentiation help

    Let for .
    What is ?

    id the answer just 5/7?
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  2. #2
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    Re: differentiation help

    Quote Originally Posted by Tweety View Post
    Let for .
    What is ?

    id the answer just 5/7?
    No.

    y=\frac{5}{7x}=\frac{5}{7}x^{-1}

    Now you can just use the power rule

    \frac{d}{dx}x^{\alpha} = \alpha x^{\alpha -1}

    In your case \alpha =-1
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