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Re: [obm-l] ajuda II

To: obm-l@xxxxxxxxxxxxxx
Subject: Re: [obm-l] ajuda II
From: Danilo Nascimento <souza_danilo@xxxxxxxxxxxx>
Date: Sat, 24 Sep 2005 04:29:34 +0000 (GMT)
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Ola

fatore 8^x+8^-x --> (2^x+^2^-x)(4^x^2-1+4^-x^2) (*)

eleve ao quadrado 2^x+2^-x = 3 ---> 4^x^2 + 2 + 4^-x^2 = 9

substituindo em * 3(7-1) = 18

Anna Luisa <annaluisacg@terra.com.br> escreveu:

Por favor.

Se 2^x + 2^ -x = 3, qual o valor d 8^x + 8^ -x.

Obrigada,

Anninha.

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