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CMC
Joined: 23 Jan 2004Posts: 4
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Posted: Tue Mar 29, 2005 9:35 pm Post subject: 求證：(a^3+b^3+c^3-3abc)是(a+b+c)的倍數
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求證：
是 的倍數
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Illusion
Frequent VisitorJoined: 19 Jan 2005Posts: 37
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Posted: Tue Mar 29, 2005 10:27 pm Post subject: Re: 求證：(a^3+b^3+c^3-3abc)是(a+b+c)的倍數
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=
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Wilson
Frequent VisitorJoined: 20 Oct 2004Posts: 79
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Posted: Wed Mar 30, 2005 6:21 pm Post subject: Re: 求證：(a^3+b^3+c^3-3abc)是(a+b+c)的倍數
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Alternatively,
Let .
From , we know that is a root of , hence is a factor of . |
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