Babyslapmafro
  • Babyslapmafro
Please help me get started with solving the following integral (click to see).
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
Babyslapmafro
  • Babyslapmafro
\[\int\limits_{}^{}(lnx)^{2}dx\]
Babyslapmafro
  • Babyslapmafro
\[\int\limits_{}^{}u ^{2}\frac{ du }{ 1/x }\] Is this the correct start before doing integration by parts?
anonymous
  • anonymous
u=ln[x]^2, v=x, du=2ln[x]1/x Integration by parts: uv-integral[vdu]

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anonymous
  • anonymous
uv-integral[vdu]= xln[x]^2-integral[2xln[x]1/x]= xln[x]^2-2integral[ln[x]]
anonymous
  • anonymous
questions or you got it from here? You will do another integration by parts. So a total of two integration by parts to get to a simple 1dx integral.
anonymous
  • anonymous
step 1: \[xln[x]^{2}-\int\limits_{}^{}2x \ln [x] \frac{ 1 }{ x }\]
anonymous
  • anonymous
simplify: \[xln[x]^2-2\int\limits_{}^{}\ln[x]dx \]
anonymous
  • anonymous
\[xln[x]^2-2(xln[x]-\int\limits_{}^{}x(1/x)dx=xln[x]^2-2(xln[x]-\int\limits_{}^{}1dx\]
anonymous
  • anonymous
\[x(\ln[x]^2-2\ln[x]+2)+c\]
anonymous
  • anonymous
What do you think? I can show you an easy way to remember these multi step problems if you'd like....

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