[obm-l] Progressoes V

To: obm-l@xxxxxxxxxxxxxx
Subject: [obm-l] Progressoes V
From: Klaus Ferraz <klausferraz@xxxxxxxxxxxx>
Date: Thu, 2 Mar 2006 23:40:25 +0000 (GMT)
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As duas progressoes geometricas a1,a2,a3.... e b1,b2,b3... sao tais que

sum(ak)=sum(bk) =1 com k =1 ateh infinito. Dado que a3=1/8 e a2=b2=x, determine x.

(sqrt(5)-1)/8

Seja N=44....488....89, onde há n 4's e n-1 8's. Prove que N é quadrado perfeito.

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