圆
的切线与椭圆
交于两点
分别以
为切点的
的切线交于点
,则点
的轨迹方程为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
2017·河北衡水·一模 查看更多[4]
更新时间:2017-03-11 10:17:29
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相似题推荐
填空题-单空题
|
较难
(0.4)
解题方法
【推荐1】已知椭圆
的离心率为
,
为左顶点,点
在椭圆
上,其中
在第一象限,
与右焦点的连线与
轴垂直,且
,则直线
的方程为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a0b452fd57bbdc105589e871baa009.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐2】已知抛物线
,点
在直线
上,过点
作
的2条切线,分别交
轴于点
、
,则
的最小值为______ ,
的外接圆面积的最小值为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c608def11fa0e2b34f05592ef1d11fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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名校
解题方法
【推荐1】已知椭圆
的左右焦点为
、
,点
为椭圆上任意一点,过
作
的外角平分线的垂线,垂足为点
,过点
作
轴的垂线,垂足为
,线段
的中点为
,则点
的轨迹方程为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a99703424a01c592cbc4880c8ec178d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94fe48bf7af022ecbbe13833fdcc2c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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【推荐2】在平面直角坐标系xOy中,若动圆C上的点都在不等式组
,表示的平面区域内,则面积最大的圆C的标准方程为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12854460a006e29d01acb1b211d79a2e.png)
您最近一年使用:0次
【推荐1】已知中心在坐标原点的椭圆
的一个焦点为
,且过点
,过原点
作两条互相垂直的射线交椭圆于
、
两点,则弦长
的取值范围为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/709b48bf92c9db084c57ee4936cb29e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b18cc3a346aff09fb8ad6eb97c41d880.png)
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【推荐2】已知曲线
.
①曲线C的图像不经过第二象限;
②若
为曲线
上一点,则
;
③存在
与曲线
有四个交点;
④直线
与曲线
无公共点当且仅当
.
其中所有正确结论的序号是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3037c4d74b6e311fef7af526870a3cb1.png)
①曲线C的图像不经过第二象限;
②若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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③存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9cb0931822d0d0f6773156a5543d1d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
④直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c801656d9541fa6b3b3523911ee92b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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其中所有正确结论的序号是
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【推荐1】
表示以点
为中心的椭圆,如图所示,
为椭圆C:
的左焦点,Q为直线
上的一点,P为椭圆C上的一点,以
为边作正方形
(F,P,A,B按逆时针排列),当P在椭圆上运动时,
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc5d275721db46e39e5b23a7f2b64268.png)
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您最近一年使用:0次
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解题方法
【推荐2】已知
为椭圆
上两点,线段
的中点在圆
上,则直线
在
轴上截距的取值范围为__________ .
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