已知圆
,直线
,如果圆
上总存在点
,它关于直线
的对称点在
轴上,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8af7e6b23505021220023bb7932f23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b951d47ec2a09e6f5bae03c134fe9042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
更新时间:2018-07-11 15:05:48
|
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解题方法
【推荐1】如图,点
为
内一点,
,
,
,过点
作直线分别交射线
,
于
,
两点,则
的最大值为_____________ .
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填空题-单空题
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名校
解题方法
【推荐2】如图,OPQ是半径为2,
的扇形,C是弧PQ上的点,ABCD是扇形的内接矩形,设
,若
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的值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a42094fcc37954384a12a626ab5440.png)
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【推荐1】已知点A为抛物线
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填空题-单空题
|
较难
(0.4)
名校
解题方法
【推荐2】已知直线
与椭圆
:
(
)相交于
两点,且线段
的中点
在直线
:
上,椭圆
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关于直线
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上,则椭圆
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec89d17a1b8f7961e2f1f27c2d50685.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2409ed4ded46b0386de1190cbf4dfc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d0b0a3114c0b6c3da4e55f6be4ceb96.png)
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