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solve a non-linear equation

To: s-news@lists.biostat.wustl.edu
Subject: solve a non-linear equation
From: yiwu ye <yiwu21111958@yahoo.com>
Date: Wed, 1 Feb 2006 15:42:44 -0800 (PST)
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 Dear list,

Does any one know any simple command/function that can be used to sovle a non-linear equation? For example, x=a+bx*exp(-cx).Given a, b and c, to calculate x value. Thanks for help.

Yiwu



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