[obm-l] divisibilidade

To: obm-l@xxxxxxxxxxxxxx
Subject: [obm-l] divisibilidade
From: "J�nior" <jssouza1@xxxxxxxxx>
Date: Tue, 11 Apr 2006 23:42:24 -0300
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Sejam a, b, c n�meros inteiros tais que 100a + 10b + c seja divis�vel por 109. Mostre que (9a-c)^2 +9b^2 tamb�m � divis�vel por 109.

J�nior.