anonymous
  • anonymous
Integral of (lnx) / x ^ 2 from 1 to 2
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
I couldn't find my original post so I had to repost it :/
anonymous
  • anonymous
integrate by parts
anonymous
  • anonymous
I know that but how!?

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anonymous
  • anonymous
choose f and dg so that the integral df g will solve easily
anonymous
  • anonymous
let f be lnx and dg be 1/x^2
anonymous
  • anonymous
df = dx/x and g= -1/x
anonymous
  • anonymous
\[\int\limits_{}^{}fdg = fg - \int\limits_{}^{}gdf\]
anonymous
  • anonymous
But I end up taking the integral of a natural log... don't i?
anonymous
  • anonymous
no, you end up taking the derivative of it
anonymous
  • anonymous
Oh you used the opposite for f and dg... ok that works

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