anonymous
  • anonymous
integrate x^3.logx
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
limits?
anonymous
  • anonymous
hw do u decide the functions f and g
anonymous
  • anonymous
no it is indefinite integral

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anonymous
  • anonymous
i have been told a order for that
anonymous
  • anonymous
guess what? parts again
anonymous
  • anonymous
ya......u gotta explain me d best fit technique
anonymous
  • anonymous
well this time it will be easier to find the anti derivative of \[x^3\] then to keep integrating \[\ln(x)\]so i would make \[u=\ln(x), du =\frac{1}{x}dx, dv = x^4, v=\frac{x^4}{4}\] and it should work out nicelyi
anonymous
  • anonymous
notice that in the first step the log is gone, and you can simplify the second integral easily because you will end up with \[-\frac{1}{4}\int \frac{x^4}{x}dx=-\frac{1}{4}\int x^3dx\] so you will be done after one step
anonymous
  • anonymous
got it ..this needs practice i guess
anonymous
  • anonymous
that is the only way you will know what to pick. on the other hand, if you picked \[dv=\ln(x)\] then you would have \[v=x\ln(x)-x\] and you see that your second integral would be a real pain
anonymous
  • anonymous
ya tryed it that way it was hard

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