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[obm-l] geo espacial II

To: obm-l@xxxxxxxxxxxxxx
Subject: [obm-l] geo espacial II
From: Faelccmm@xxxxxxx
Date: Thu, 20 Feb 2003 17:13:38 EST
Reply-To: obm-l@xxxxxxxxxxxxxx
Sender: owner-obm-l@xxxxxxxxxxxxxxxxxxxxx

Olá pessoal,

Como se resolve esta questão:

(FUVEST-SP) É dado um tetraedro regular ABCD de aresta 1. Na aresta BC, toma-se um ponto P de modo que PA + PD tenha o menor valor possível.

a) Qual o valor da razão PB/CB ?
b) Calcule PA + PD

resp: 1/2 e raiz(3)

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