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[SPAM] [obm-l] Métodos Numéricos - Erros
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- Subject: [SPAM] [obm-l] Métodos Numéricos - Erros
- From: "Daniel S. Braz" <dsbraz@xxxxxxxxx>
- Date: Sat, 5 Apr 2008 22:58:40 -0300
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Senhores,
Por favor, alguém pode me ajudar a entender este problema?
Seja um sistema de aritmética de ponto flutuante de quatro dígitos,base decimal e com acumulador de precisão dupla. Dados os números:
x = 0,7237*10^4y = 0,2145*10^-3z = 0,2585*10^1
efetue as seguintes operações e obtenha o erro relativo no resultado,supondo que x, y e z estão exatamente representados:
a) x + y + zb) x - y - z
Eu sei efetuar as operações, mas não sei encontrar o erro relativo....
As respostas encontradas no livro, para os erros relativos, são:
a) abs(ER) < 10^-3b) abs(ER) < 1,0002*10^-3
Obrigado.
Daniel.
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