Re: Sum to n of a GP: Solving for r.
From: Narasimham G.L. (mathma18_at_hotmail.com)
Date: 08/13/04
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Date: 13 Aug 2004 00:15:20 -0700
Good question. Only for large n(N) [n-> Inf], S=a exp(n*r),r =
log(S/a)/n. For smaller n, I do not know if closed/analytical form
exists, numerical iteration methods like Newton's can be used.
bejoynarayana@hotmail.com (Bejoy Narayana) wrote in message news:<30de7f65.0408111144.2cb34103@posting.google.com>...
> How do I solve S= a(1-r^n)/(1-r) for r.
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