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[apcalculus] Re: Integration by Parts Question
Posted:
May 12, 2005 9:28 AM


Hello everyone  On Wed, 11 May 2005, Larry Rose wrote:
The problem is the integral of (x^3 + 5) (ln x) dx. If I let u = (x^3 + 5) and dv = (ln x) then I get the solution (x^3 + 5) (1/x)  (3x^2)/2 + C (which checks when I take the derivative).  Your problem occurs right here. If you let dv = ln x, then v = xlnx  x and you do not get the solution stated above.
Hope this helps.
Dick Maher
Richard J. Maher Mathematics and Statistics Loyola University Chicago 6525 N. Sheridan Rd. Chicago, Illinois 60626 17735083565 rjm@math.luc.edu
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