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Math Help - [SOLVED] Derivatives

  1. #1
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    [SOLVED] Derivatives

    What are the first and SECOND derivatives of the following function

    x+5/2x-4

    thannk you
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  2. #2
    Senior Member
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    Dec 2008
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    Is it \frac{x+5}{2x-4}?

    In that case, you could use the Fraction Rule:

    \frac{d}{dx}\left(\frac{f(x)}{g(x)}\right)=\frac{g  (x)f'(x)-f(x)g'(x)}{g(x)^2}.

    Note that \frac{d}{dx}(x+5)=1 and \frac{d}{dx}(2x-4)=2.

    You can use the same rule for the second derivative.
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