作者debdeb ()
看板Math
标题[中学] 不等式范围
时间Tue Apr 26 23:37:58 2011
Find the range of values of the constant a for which there exist
exactly two integers satisfying the two quadratic inequalities in x
x^2 - 4x - 5 ≧ 0
x^2 - (3a-2)x -6a ＜ 0
simultaneously.
请问a的范围该怎麽算？
谢谢！！
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1F：推 jacky7987 :似乎硬干就可以有答案,配合洽有两个整数的提示 04/27 00:26
2F：→ debdeb :谢谢。其实我有答案，只是不了解怎麽推导XD 04/27 06:41