[obm-l] Equação irracional

To: obm-l@xxxxxxxxxxxxxx
Subject: [obm-l] Equação irracional
From: "Ronaldo Alonso" <ronaldo.luiz.alonso@xxxxxxxxx>
Date: Tue, 2 Jan 2007 08:00:03 -0200
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Qual valor de x ?
(x+9)^{-1/3} - (x-9)^{-1/3} = 5