设
为坐标原点,给定一个定点
,而点
在
正半轴上移动,
表示
的长,则
中两边长的比值
的最大值为_____ .
![](https://img.xkw.com/dksih/QBM/2014/5/21/1571733368504320/1571733374107648/STEM/e998ff3e78cb4364b2819e8e962021ac.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2014/5/21/1571733368504320/1571733374107648/STEM/e72be47643ee462db2de2538519c827e.png?resizew=45)
![](https://img.xkw.com/dksih/QBM/2014/5/21/1571733368504320/1571733374107648/STEM/19d68b998a534618bf50af13c70c5ba3.png?resizew=47)
![](https://img.xkw.com/dksih/QBM/2014/5/21/1571733368504320/1571733374107648/STEM/51853762d47f4313a36feb4d58916ad8.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2014/5/21/1571733368504320/1571733374107648/STEM/f10a3c468d5e43a5aa810054206bc825.png?resizew=29)
![](https://img.xkw.com/dksih/QBM/2014/5/21/1571733368504320/1571733374107648/STEM/6f1a05e7205d495bb78e05a9397c92b8.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2014/5/21/1571733368504320/1571733374107648/STEM/cae27e1e432b495a861e65c14f976cbc.png?resizew=47)
![](https://img.xkw.com/dksih/QBM/2014/5/21/1571733368504320/1571733374107648/STEM/bf5a6096d7e945faa586bfc80ec1ea49.png?resizew=32)
2011·江苏南京·二模 查看更多[3]
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更新时间:2016-12-03 00:42:21
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【知识点】 求二次函数的值域或最值
相似题推荐
填空题-单空题
|
较易
(0.85)
解题方法
【推荐1】设函数
满足:对任意实数x都有
,若
在
上恒成立,则实数a的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f08f1862ef461cf071f928b600546e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1312d640aa773779a34e9d50791ef5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5432187d1c042787433b7633292d00fe.png)
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