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解题方法
1 . 过点
作斜率为
的直线交椭圆
于
两点,若
上存在相异的两点
使得
,则
外接圆半径的最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797c488729678e74e0825c2e92b544b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/680a5a5c24751e0e37ee306308465faf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e88ab2f7f0cc281e62fbc7e920e0cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f2ef94a9b287291939e463b5a7c7ad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96645a3530e72d5d733d2c72147d340.png)
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2 . 已知抛物线
的焦点为
,过
作两条夹角为
的直线
、
,直线
与抛物线交于点
、
,直线
与抛物线交于点
、
,则
的最小值为__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ad7c068b9b7c0fd764cf7746407079.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3d3a0a104ad4fcbecdc66b54ee930c.png)
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2020-07-17更新
|
485次组卷
|
4卷引用:湖北省华大新高考联盟名校2020届高三(5月份)高考数学(理科)模拟试题
湖北省华大新高考联盟名校2020届高三(5月份)高考数学(理科)模拟试题湖南省湘潭市2020届高三下学期第四次模拟考试理科数学试题华大新高考联盟名校2020届高考预测考试5月数学理科试题(已下线)专题27 《圆锥曲线与方程》中的夹角角度问题-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)
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3 . 正方形
中,点
在以
为圆心且与直线
相切的圆上运动,若
(其中
,
),则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4ae2789a5e286e2ce63783a7d60165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cefeddff52b02a43831beeb4bb6faa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
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2020-03-16更新
|
930次组卷
|
4卷引用:2019届湖北省黄冈中学高三三诊理科数学试题
2019届湖北省黄冈中学高三三诊理科数学试题2019届湖北省黄冈中学高三三诊文科数学试题山西省太原市第五十六中学2020-2021学年高一下学期第一次月考数学试题(已下线)三省三校2022届高三下学期第一次模拟数学(理)试题变式题11-15
4 . (选修4-4:坐标系与参数方程)在直角坐标系
中,曲线
的参数方程是
,以坐标原点为极点,
轴正半轴为极轴建立极坐标系,曲线
的极坐标方程是
,则两曲线交点间的距离是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9db853370e5d23182a6cbf83781690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48517022bf22cbdac17edc6f69e323d3.png)
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2016-12-03更新
|
1648次组卷
|
3卷引用:2015届湖北省襄阳市五中高三5月模拟考试一理科数学试卷
5 . (选修4-4:坐标系与参数方程)已知直线
与曲线
(
为参数),有且仅有一个公共点,则正实数
的值为____ .
![](https://img.xkw.com/dksih/QBM/2015/6/10/1572120852537344/1572120858558464/STEM/8cf54e91f7334dfb8c7790a5722cb031.png?resizew=153)
![](https://img.xkw.com/dksih/QBM/2015/6/10/1572120852537344/1572120858558464/STEM/b783da08c1a441e68219eb17ce764c35.png?resizew=84)
![](https://img.xkw.com/dksih/QBM/2015/6/10/1572120852537344/1572120858558464/STEM/05f1d00d686b407185cb4a28c6c84900.png?resizew=11)
![](https://img.xkw.com/dksih/QBM/2015/6/10/1572120852537344/1572120858558464/STEM/08d82e507c414181972d92dc9d737d04.png?resizew=13)
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2014·湖北·一模
6 . 在直角坐标平面内,以坐标原点O为极点,
轴的非负半轴为极轴建立极坐标系,已知点M的极坐标为
,曲线C的参数方程为
(
为参数),则点M到曲线C上的点的距离的最小值为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37360cb3cb1ccaef8fc86fd592862ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b344a5636b36bac0b286fa5504c9e46e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d1a34ae2b8c77f8d7e355c6d1d667e.png)
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10-11高三下·湖南长沙·阶段练习
7 . 已知曲线C的极坐标方程为
,则曲线C上的点到直线
为参数)的距离的最大值为___________ .
![](https://img.xkw.com/dksih/QBM/2012/7/21/1570934477586432/1570934482722816/STEM/a0b62dd8c03145aa8c9d5ef65ec59bc5.png?resizew=74)
![](https://img.xkw.com/dksih/QBM/2012/7/21/1570934477586432/1570934482722816/STEM/2aec568a7a6f40cba6706ed450e6900e.png?resizew=85)
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