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Re: [obm-l] 4 é igual a 6?

To: obm-l@xxxxxxxxxxxxxx
Subject: Re: [obm-l] 4 é igual a 6?
From: Artur Costa Steiner <artur_steiner@xxxxxxxxx>
Date: Mon, 13 Feb 2006 05:53:22 -0800 (PST)
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Certamente que 4 nao eh igual a 6.

O erro estah aqui:


> (4 - 5)2  = (6 - 5)2

Isto nao implica que 4 - 5 = 6 -5

Se x e y sao numeros reais, entao x = y => x^2 = y^2.
Mas x^2 = y^2 NAO implica que x =y, pois podemos
tambem ter x = -y. 

Artur

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References:
- [obm-l] 4 é igual a 6?
  - From: Alamir Rodrigues

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