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    need a method

    \large \tex \int \large \tex \frac{1}{u ln u} du

    thnx
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    rewrite as

    \tex \large \int \frac{\frac{1}{u}}{lnu}

    Does that make it easier?

    If you still dont understand what to do heres a hint

    Spoiler:
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    \tex \large \int \frac{f'(x)}{f(x)} = ln f(x) + c
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    Oh yeah I got it =) it was written in a bit unusual manner
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    Yeah.

    With integration i always have a little system in my head when tackling one.

    Manipulation - See if you can manipulate it to get something nicer (especially when integrating fractions)

    Methods - Go through direct recognition see if you can find something to differentiate that is similar to the integral. Substitution see if theres something nasty you can substitute and lastly by parts if its a product of two functions its obviously gonna be by parts however if the question doesnt make it clear just go through the methods and see which one you think best fits the question.
 
 
 

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