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Homework Help: Integration by Parts

  1. Jan 22, 2006 #1
    Does the integral of x(ln x)^4 =
    x^2/x(ln x)^4 - x^2(ln x)^3 + 3/2 x^2 (ln x)^2 - 3/2 x^2(ln x) + 3/2 x +C ?

    Or did I do something completely wrong?
    Sorry I didn't show my work, it would probably take me 30 mins to type it up here.
     
  2. jcsd
  3. Jan 22, 2006 #2

    StatusX

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    Why don't you try differentiating it and see? That's all we could do anyway, and we won't do your tedious work for you.
     
  4. Jan 22, 2006 #3

    benorin

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    Maple gives

    1/2*x^2*ln(x)^4-x^2*ln(x)^3+3/2*x^2*ln(x)^2-3/2*x^2*ln(x)+3/4*x^2+C

    and, in the future, try www.integrals.com (which in this case does not give the form of the answer your looking for.)
     
  5. Jan 22, 2006 #4
    LOL, i forgot about differentiating that. Damn, i was so tired after solving that my mind shut down. LOL THanks.

    Thanks benorin too, my professor was telling us about some website that does that, and i forgot to write it down.
     
    Last edited: Jan 22, 2006
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