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February 1st, 2011, 09:29 PM  #1 
Newbie Joined: Jun 2009 Posts: 5 Thanks: 0  A simplification problem..
Hi all. can anyone help me to simplify this term to solve for r. 7.88 *( r^2)*ln r + 0.003863 * ( r^2 )  0.81 ln r + 1.974 = 0 Thanks and regards; 
February 2nd, 2011, 12:03 AM  #2 
Member Joined: Jan 2011 Posts: 36 Thanks: 0  Re: A simplification problem..
You will not be able to find an analytic expression for r. If you need only find the value for r then you can apply one of many numerical methods to locate the values of r which cause the expression to be true. This isn't particularly difficult to just guess and check answers and try to find the zero that way. 

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