设
,且
恒成立.则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd0f1e3e3b41948f1b3d287c4b0cb44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d9dd9cf07f855ed94680cb6601a6e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
2005高一·河南·竞赛 查看更多[1]
更新时间:2018-12-15 18:12:27
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【推荐2】已知
,
,
都是定义在
上的函数.我们定义上的函数为
、
、
、
的最小值.则
的最大值等于__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b388e3467e861379f6d240f80e5ba340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc833417345710524c29cf0d8a9384d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bffc9c4bf9de4d804885955aff039ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/548636534994cd465dfc7bf7dd41505b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1e2de22cb8df73c6dd6e61139d8196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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