Re: [問題] 數學一題
: 已知f(x),g(x)是兩個實系數多項式,
: 且知f(x)除以g(x)的餘式為x^4-1,
: 試問下列哪一個選項不可能是f(x)與g(x)的公因式?
: (1)5 (2)x-1 (3)x^2-1 (4)x^3-1 (5)x^4-1
f(x) = g(x)h(x) + (x^4-1)
(f(x), g(x)) = (g(x), (x^4-1))
x^4-1 = (x^2 + 1)(x^2 - 1) = (x^2 + 1)(x + 1)(x - 1)
所以說(1), (2), (3), (5)都有可能
這似乎是學測題?
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※ 編輯: hsnuyi (118.168.236.205 臺灣), 09/10/2019 17:00:30
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