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Math Help - Finding Derivatives

  1. #1
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    Finding Derivatives

    f(x)= (lnx)/(1-e^x)


    Its got me stumped, I understand the basics of deriving the simpler versions of these. lnx=1/x but, I am having problems with coming up with the solution for this.
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  2. #2
    Math Engineering Student
    Krizalid's Avatar
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    Santiago, Chile
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    You have to apply the Quotient Rule:

    \left[ {\frac{{f(x)}}<br />
{{g(x)}}} \right]' = \frac{{f'(x) \cdot g(x) - f(x) \cdot g'(x)}}<br />
{{g^2 (x)}}.
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