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Math Help - Integration by part Problem

  1. #1
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    Integration by part Problem

    \int \frac{1}{xln5x} dx .
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  2. #2
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    Re: Integration by part Problem

    Substitute y=\ln{5x} and you should get a very familiar integral.

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    Re: Integration by part Problem

    Quote Originally Posted by mastermin346 View Post
    \int \frac{1}{xln5x} dx .

    You don't need parts!

    What is the derivative of 5ln(ln(5x))~?
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