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[obm-l] +++duvidas

To: "obm-l" <obm-l@xxxxxxxxxxxxxx>
Subject: [obm-l] +++duvidas
From: "aryqueirozq" <aryqueirozq@xxxxxxxxxx>
Date: Fri, 19 Nov 2004 14:21:59 -0200
Reply-To: obm-l@xxxxxxxxxxxxxx
Sender: owner-obm-l@xxxxxxxxxxxxxx

Quantos números reais satisfazem a equação

(x²-5x+7)^x+1=1 ?

a) 0 b) 1 c) 2 d) 3 e) 4

só achei -1 como resposta, eo gabarito está dizendo que eh a letra D como resposta.Quais as outras solucoes?

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