1 . 已知圆
,直线
.
(1)若圆O的弦AB恰好被点
平分,求弦AB所在直线的方程;
(2)点Q是直线l上的动点,过Q作圆O的两条切线,切点分别为C,D,求直线CD经过的定点;
(3)过点
作两条相异的直线,分别与圆O相交于E,F两点,当直线ME与直线MF的斜率互为倒数时,求证:线段EF的中点G在直线
上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/393a0e30b023f2a20d366eef481b5eea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41888144f7eb9ca029d624560530d82.png)
(1)若圆O的弦AB恰好被点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f13bf66fc845b115de4ec45b4be0e23.png)
(2)点Q是直线l上的动点,过Q作圆O的两条切线,切点分别为C,D,求直线CD经过的定点;
(3)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cda12642d59a5817e8990c43de20535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
您最近一年使用:0次
2023-02-23更新
|
314次组卷
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2卷引用:四川省成都市2023-2024学年高二上学期九月调研考试(校级联考)数学试题
名校
解题方法
2 . 如图:已知A,
是圆
:
与
轴的交点,
为直线
:
上的动点.
![](https://img.xkw.com/dksih/QBM/2021/10/16/2830810328088576/2832129710915584/STEM/97367d17f5dc4dd7ae2e7d4c7708da69.png?resizew=240)
(1)判断直线
与圆
的位置关系,并说明理由;
(2)过点
作圆
的切线,切点为
,
,当
最小时,求直线
的方程;
(3)
,
与圆的另一个交点分别为
,
.求证:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://img.xkw.com/dksih/QBM/2021/10/16/2830810328088576/2832129710915584/STEM/97367d17f5dc4dd7ae2e7d4c7708da69.png?resizew=240)
(1)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bad3e78e5095b12eb4d5b19880bdd806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1c1270c110ad3bb7e6a252deda48c8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.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/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
真题
3 . 设
,在平面直角坐标系中,已知向量
,向量
,
,动点
的轨迹为E.
(1)求轨迹E的方程,并说明该方程所表示曲线的形状;
(2)已知
,证明:存在圆心在原点的圆,使得该圆的任意一条切线与轨迹E恒有两个交点A,B,且
(O为坐标原点),并求出该圆的方程;
(3)已知
,设直线
与圆C:
(1<R<2)相切于A1,且
与轨迹E只有一个公共点B1,当R为何值时,|A1B1|取得最大值?并求最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d1dbacb32c6aa64b346cfc40c5e7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069d5e4878e17bf1f2bd494d5f1c8447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cc74c79951a73d068aa2229f7d415d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a32a090bc3ff8e2e53407c2ae4084cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ff7e0ef1f622120cc1b18e9d3e80ec.png)
(1)求轨迹E的方程,并说明该方程所表示曲线的形状;
(2)已知
![](https://img.xkw.com/dksih/QBM/2010/3/12/1569631062581248/1569631152578560/STEM/ad66f3538bea4def8499012dccd571f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ada5c15d7b42b2fb2836c3478ae5fb34.png)
(3)已知
![](https://img.xkw.com/dksih/QBM/2010/3/12/1569631062581248/1569631152578560/STEM/ad66f3538bea4def8499012dccd571f5.png)
![](https://img.xkw.com/dksih/QBM/2010/3/12/1569631062581248/1569631152578560/STEM/eb968bca05eb47dcb4e86eb45f24c831.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d443779a9f5889e921a60e5b452a926f.png)
![](https://img.xkw.com/dksih/QBM/2010/3/12/1569631062581248/1569631152578560/STEM/eb968bca05eb47dcb4e86eb45f24c831.png)
您最近一年使用:0次
2019-01-30更新
|
2830次组卷
|
4卷引用:2012-2013学年四川省外语实验学校高二4月数学试卷
(已下线)2012-2013学年四川省外语实验学校高二4月数学试卷2009年普通高等学校招生全国统一考试文科数学(山东卷)高中数学解题兵法 第三十四讲 分类讨论是一种重要的解题策略(已下线)专题23 圆锥曲线中的最值、范围问题 微点1 圆锥曲线中的最值问题
名校
4 . 已知圆
,直线
过点
且与圆
相切 .
(I)求直线
的方程;
(II)如图,圆
与
轴交于
两点,点
是圆
上异于
的任意一点,过点
且与
轴垂直的直线为
,直线
交直线
于点
,直线
交直线
于点
,求证:以
为直径的圆
与
轴交于定点
,并求出点
的坐标 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560adea7b0d4fbe4131fc41f3fcbd871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2b1f4120365cb6ee4925fe417563f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(I)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(II)如图,圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/bfd28790-e7b5-43f4-824b-e76c1b366702.png?resizew=141)
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2018-07-25更新
|
2070次组卷
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3卷引用:四川省成都市双流区双流中学2023-2024学年高二上学期10月月考数学试题