1 . 已知圆
与
轴相切,圆心在直线
上,且直线
截圆所的弦长为
.
(1)求圆
的方程;
(2)过点
能否作圆
的切线,若能,求出切线长;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934afdd41b042c53d1e54bc73a8713e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbff61fe9d4e93d7cc338489d1c99c40.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2137a9e6b3daff334764471c8a2c77d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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解题方法
2 . 已知椭圆
:
的右焦点为
,离心率为
,过原点的直线
(不与坐标轴重合)与
交于
两点,且
.
(1)求椭圆
的方程;
(2)过
作
轴于点
,连接
,并延长交椭圆
于
,证明以线段
为直径的圆经过点
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075ba8c6fb5ef7288cd3fed425c8e69e.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77969a826a095e26d60c13c6d85b369b.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd263fa65347735f95d3364e5b91a58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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名校
3 . 在直角坐标系
中,圆
的方程为
.
(1)若圆
上有两点
,
关于直线
对称,且
,求直线
的方程;
(2)圆
与
轴相交于
,
两点,圆内的动点
使
,
,
成等比数列,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
(1)若圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/c204834608f1a8fba15747210dd7c5af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a14a85d5d71e238da9f4e499faec0f30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d063ec7f9dbeba72fabf4437f9400e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f625aa2ab29879c1df77417e9c1cf71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ce8eed2660a33465a7f764e76cdba8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc86613c8ad7fb3c3984870bf33cfe43.png)
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2020高三·江苏·专题练习
4 . 求圆心在
轴上,半径为5,且过点A(2,-3)的圆的方程.
![](https://img.xkw.com/dksih/QBM/2020/1/21/2382047307857920/2383253294309376/STEM/784a8415519d4871be25072da8115bd1.png?resizew=13)
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5 . 设命题p:点(1,1)在圆x2+y2﹣2mx+2my+2m2﹣4=0的内部;命题q:直线mx﹣y+1+2m=0(m∈R)不经过第四象限,如果p∨q为真命题,p∧q为假命题,求m的取值范围.
您最近一年使用:0次
6 . 如图所示,我国某海岸线可看作由圆弧AB和射线BC连接而成,其中圆弧AB所在圆O的半径为12海里,圆心角为120°,规定外轮除特许外,不得进入离我国海岸线12海里以内的区域.在港口A处设有观察站,外轮一旦进入规定区域,观察站会接收到预警信号,现从A处测得一外轮在北偏东60°,距离港口x海里的P处,沿直线PA方向航行.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/1c26b500-dc65-4ca8-a556-eab2cde98d5a.png?resizew=234)
(1)当x=30时,分别求出外轮到海岸线BC和弧AB的最短距离,并判断观察站是否接收到预警信号?
(2)当x为何值时,观察站开始接收到预警信号?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/1c26b500-dc65-4ca8-a556-eab2cde98d5a.png?resizew=234)
(1)当x=30时,分别求出外轮到海岸线BC和弧AB的最短距离,并判断观察站是否接收到预警信号?
(2)当x为何值时,观察站开始接收到预警信号?
您最近一年使用:0次
名校
7 . 一个等腰三角形底边上的高等于5,底边两端点的坐标分别是
和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c2bb2ff0cf1ae6dec186d4090d9c9c6.png)
(1)求它的外接圆的方程.
(2)若点
在(1)中所求得的圆外,求
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7860ed059932e1bc290b64d85d1a08cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c2bb2ff0cf1ae6dec186d4090d9c9c6.png)
(1)求它的外接圆的方程.
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc883d21bdcf3e6b9cc147dd33125a23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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名校
8 . 如图,
,
分别是通过某城市开发区中心O的两条东西和南北走向的街道,连接M,N两地间的铁路是圆心在
上的一段圆弧.若点M在点O正北方向,且
,点N到
,
的距离分别为5km和4km.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/ae6aa738-7e99-4f57-814a-57a45292daef.png?resizew=131)
(1)建立适当的坐标系,求铁路路线所在圆弧的方程.
(2)若该城市的某中学拟在点O正东方向选址建分校,考虑环境问题,要求校址到点O的距离大于4km,并且铁路上任意一点到校址的距离不能小于
km,求该校址距点O的最近距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b65ccc8d2308f4297f1b73e960ef79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/ae6aa738-7e99-4f57-814a-57a45292daef.png?resizew=131)
(1)建立适当的坐标系,求铁路路线所在圆弧的方程.
(2)若该城市的某中学拟在点O正东方向选址建分校,考虑环境问题,要求校址到点O的距离大于4km,并且铁路上任意一点到校址的距离不能小于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df397b5075ae27f938b780936fd718c.png)
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2019-10-11更新
|
99次组卷
|
3卷引用:江西省南昌市八一中学、洪都中学、麻丘高中等六校2017-2018学年高二10月联考数学试题
解题方法
9 . 已知椭圆C:
(a>b>0)上的任意一点到它的两个焦点(-c,0),(c,0)的距离之和为
,且它的焦距为2.
(1)求椭圆C的方程;
(2)已知直线
与椭圆C交于不同的两点A,B,且线段AB的中点不在圆
内,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
(1)求椭圆C的方程;
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af38d60e314874bec08ace88bf9209e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55db71d9385e70266bd06330f261013b.png)
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10 . 已知直线
与圆
相交于
两点,弦
的中点为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b0fc22034c9db29b23c4cf9faf5af6.png)
(1)求实数
的取值范围以及直线
的方程;
(2)若以
为直径的圆过原点
,求圆
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1686231d0f6ec2943ac93f928f8c338d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b0fc22034c9db29b23c4cf9faf5af6.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)若以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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