1 . 已知圆
:
.
(1)过点
的直线
与圆
相切,求直线
的方程;
(2)过圆
上一点
作两条相异直线分别与圆
相交于
,
两点,且直线
和直线
的倾斜角互补.求证:直线
的斜率为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3864364d232bfd1af09e354585ed3a38.png)
(1)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12bda1c577ff8f005bd78247ae955ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)过圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef70974f88652aaa60794f90a037363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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2 . 若
是直线
:
上一动点,过
作圆
:
的两条切线,切点分别为
,
,则四边形
面积的最小值为( )
![](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/9f699a004343b7bccb40ee14a04d9447.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/5d2025bac7b08ec9f206cfce02bdd7ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/283b0cef5d644b8dceb910ce2c76f21c.png)
A.1 | B.2 | C.3 | D.4 |
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解题方法
3 . 若
是直线
:
上一动点,过
作圆
:
的两条切线,切点分别为
,
,则四边形
面积的最小值为( )
![](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/eab0ffec8f46fe46fbc6e8e13d16a58b.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/f581d0a15670dfbbcf1f97d37d111810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/283b0cef5d644b8dceb910ce2c76f21c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 已知点
,直线
及圆
.
(1)求过
点的圆的切线方程.
(2)若直线
与圆相切,求
的值.
(3)若直线
与圆相交于
、
两点,且弦
的长为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986ca40dbb918d7d6adeb3c1a4ba5c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a59fd60e71db37e1aa5632b07dd48dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364621ce2d186256515a9af4285ed168.png)
(1)求过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a59fd60e71db37e1aa5632b07dd48dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a59fd60e71db37e1aa5632b07dd48dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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5 . 若过点
有两条直线与圆
相切,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76095b03d243fead89a6493614e4b68a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7cf4ac183fad68c89dd7f52281c3b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-01-03更新
|
490次组卷
|
3卷引用:安徽省宿州市十三所省重点中学2019-2020学年高二上学期期中联考数学(理)试题
6 . 由直线
上的任意一个点向圆
引切线,则切线长的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e47acafe3058e0cc83b516f684f247a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc8d42ed3b82ec036e557b694d48cd81.png)
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2020-02-05更新
|
870次组卷
|
10卷引用:安徽省宿州市十三所省重点中学2019-2020学年高二上学期期末考试数学(文)试题
安徽省宿州市十三所省重点中学2019-2020学年高二上学期期末考试数学(文)试题广东省广州市番禺区仲元中学2016-2017学年高一上学期期末考试数学试题【全国百强校】广东省广州市番禺区仲元中学2016-2017学年高一上学期期末数学试题辽宁省锦州市联合校2019-2020学年高二上学期期末数学试题广东省深圳市高级中学2019-2020学年高三下学期3月线上模拟数学(文)试题四川省叙州区第一中学2020-2021学年高二上学期第二次月考数学(理)试题 厦门市国祺中学2020-2021学年高二上数学第一次月考试题四川省叙州区第一中学2020-2021学年高二上学期第二次月考数学(文)试题(已下线)2021年新高考天津数学高考真题变式题11-15题(已下线)数学(天津卷03)
13-14高二上·安徽宿州·期中
名校
7 . 已知点
,直线
及圆
.
(1)求过点M的圆C的切线方程;
(2)若直线
与圆C相切,求实数
的值;
(3)若直线
与圆C相交于A、B两点,且弦AB的长为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/543d7c6ecbd812e056af069868e97c5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ca6af1a0ac44fb75113691d6bcaf41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a160c78f124d6ed7f2d2fb62d0d524.png)
(1)求过点M的圆C的切线方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ca6af1a0ac44fb75113691d6bcaf41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ca6af1a0ac44fb75113691d6bcaf41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2019-12-14更新
|
1748次组卷
|
10卷引用:2013-2014学年安徽泗县双语中学高二上学期期中考试数学试卷
(已下线)2013-2014学年安徽泗县双语中学高二上学期期中考试数学试卷浙江省嘉兴市南湖区第一中学2019-2020学年高二上学期期中数学试题云南省曲靖市宣威民族中学2018-2019学年高一下学期第一次月考数学试题宁夏银川一中2019-2020学年高一上学期期末数学试题人教A版(2019) 选择性必修第一册 过关斩将 第二章 直线和圆的方程 2.5 直线与圆、圆与圆的位置关系 2.5.1 直线与圆的位置关系新疆乌鲁木齐市第八中学2018-2019学年高一下学期期末考试数学试题陕西省延安市黄陵中学2020-2021学年高一上学期期末数学试题新疆乌鲁木齐市第四中学2020-2021学年高一下学期期末数学试题(已下线)课时2.5.1 直线与圆、圆与圆的位置关系(01)直线与圆的位置关系-2021-2022学年高二数学同步练习和分类专题教案(人教A版2019选择性必修第一册)圆的弦长与圆心距
2011·安徽宿州·一模
8 . 已知圆(x-1)2+(y-1)2=1和点A(2a,0),B(0,2b)且a>1, b>1.
(1)若圆与直线AB相切,求a和b之间的关系式;
(2)若圆与直线AB相切且△AOB面积最小,求直线AB的方程.(O为坐标原点)
(1)若圆与直线AB相切,求a和b之间的关系式;
(2)若圆与直线AB相切且△AOB面积最小,求直线AB的方程.(O为坐标原点)
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