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一道代数题

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longzaifei posted 2014-10-11 14:11 |Read mode
已知 $x^3+ax^2+bx+c =0$ 的所有根大于$2$,且$a+b+c+1=-2009$, 求 $a$ 的值.

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kuing posted 2014-10-11 16:23
没有其他条件了?

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original poster longzaifei posted 2014-10-11 16:29
回复 2# kuing

我自己觉得应该是大于2的整数根。

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爪机专用 posted 2014-10-11 16:43
回复 3# longzaifei

嗯,显然是这样,否则无法确定。
有整数条件就没难度了。

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