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    Can somebody show me how to do this, having no luck with it - thanks!
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    Try using integration by parts.
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    That's what I've been doing, I have a load of answers but can't see which is correct.
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    u = ln x, du/dx = 1/x

    dv/dx = x, v = (x^2)/2

    Plop your numbers in into the by parts formula. Voila.

    Whenever theres a lnx involved and its a product always makes u = lnx.
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    When doing a by parts problem the general rule is to let any power of x be the u term (ie. x,x^2) EXCEPT when there is a log term in which case you make the log term the u term.
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    I get the answer as:

    (X^2)(lnx)/2 - (x^3)/6

    Is this correct?
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    Actually is the answer this:

    (X^2)(lnx)/2 - 1/4(x^2)
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    yes.
 
 
 
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