Simplifying and Solving a Natural Log ProblemDate: 11/15/95 at 12:40:58 From: Anonymous Subject: integration of ln(r/a)dr Integrate ln(r/a)dr -- the limits are a to b. Is this possible, or is there some table for this?? Thanx. Date: 12/14/95 at 22:10:23 From: Doctor Ken Subject: Re: integration of ln(r/a)dr Hello! The first thing I think I'd do is to simplify the problem a little bit. You can actually make the "a" not matter so much in this problem by noticing that ln(r/a) = ln(r) - ln(a), and ln(a) is just a constant. Then you can apply the antiderivative of Natural Log: it's r*ln(r) - r. Good luck! -Doctor Ken, The Geometry Forum |
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