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Newbie question: equations with sums.

• To: mathgroup at smc.vnet.net
• Subject: [mg92856] Newbie question: equations with sums.
• From: Vend <vend82 at virgilio.it>
• Date: Wed, 15 Oct 2008 05:38:04 -0400 (EDT)

Hello.

FullSimplify[\!\(
\*UnderoverscriptBox[\(\[Sum]\), \(i = 0\), \(\(-1\) + n\)]i\ f[
     i]\) == \!\(
\*UnderoverscriptBox[\(\[Sum]\), \(k = 0\), \(\(-1\) + n\)]k\ f[k]\)]

Evaluates to:

\!\(
\*UnderoverscriptBox[\(\[Sum]\), \(i = 0\), \(\(-1\) + n\)]i\ f[
    i]\) == \!\(
\*UnderoverscriptBox[\(\[Sum]\), \(k = 0\), \(\(-1\) + n\)]k\ f[k]\)

Why doesn't it evaluate to true? Is there a way to make the system
solve this kind of equations?