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Homework Help: Basic Integration

  1. Oct 28, 2007 #1
    [SOLVED] Basic Integration

    [tex]\int (ln(x^{20}))^{2}dx[/tex]

    Just need to find an antiderivative.

    Once again, drawing a blank on the easy stuff. Could anybody tell me which method of integration to use?
  2. jcsd
  3. Oct 28, 2007 #2
    Hrmmm..After playing with it for a long time.... I feel like a middle schooler.

    Partial integration didn't help. Couldn't find a working substitution. No trigonometric etc

    So that means (this is just a guess) that I'm probably missing a simple little step at the beginning that is throwing me off. Been searching through little identities and looking at examples in my textbook etc.

    No luck =(

    Any help would be great!
  4. Oct 28, 2007 #3


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    Um... think about the law of the log function.

    ln(x^2) = ?
  5. Oct 28, 2007 #4
    Ughh...I knew it. Forgot to change ln(x^20) into 20lnx.

    All that time wasted....lol

    Thanks tho!
  6. Oct 28, 2007 #5


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    You would have wasted more time if you didn't come here!
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