名校
1 . 已知一个圆经过直线
与圆
的两个交点,并且有最小面积,则此圆的方程为___________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55369fec27edda3c2880820d1c7df21a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e64246fcf6b95c5920595baa5a77a2e.png)
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2019-06-05更新
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7卷引用:天津市河西区新华中学2019届高考模拟考试数学(文)试题
天津市河西区新华中学2019届高考模拟考试数学(文)试题(已下线)专题9.3 圆的方程(讲)-浙江版《2020年高考一轮复习讲练测》浙江省杭州之江高级中学2020-2021学年高二上学期期末数学试题(已下线)2.3 圆与圆的位置关系(2)(已下线)第03讲 圆的方程(八大题型)(讲义)-1(已下线)2.5.2 圆与圆的位置关系【第三课】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)【类题归纳】直线圆系 化繁为简
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2 . 已知抛物线
,M为直线
上任意一点,过点M作抛物线C的两条切线MA,MB,切点分别为A,B.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(1)当M的坐标为(0,-1)时,求过M,A,B三点的圆的方程;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(2)证明:以
为直径的圆恒过点M.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7ad3432ac96b0a38beaa7f2edc3499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42502a5730e1930d77d7100d1e34707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(1)当M的坐标为(0,-1)时,求过M,A,B三点的圆的方程;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(2)证明:以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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3 . 已知直线
截圆
所得的弦长为
.直线
的方程为
.
(1)求圆
的方程;
(2)若直线
过定点
,点
在圆
上,且
,
为线段
的中点,求
点的轨迹方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aefcbc03a5c916ebb20f891a0fe7e0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75af819918225a3e25283985e45b6870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01961669cd597f61fa48e9853d678bb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d10edc590b10db534d86d6d5945ba8d5.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a8d61bb833ad58741319f66e85ca62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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4 . 已知点
和圆
,过点
作圆
的切线有两条,则实数
的取值范围是______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530e5817131adf2c05b99ff18eb9060f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf86c82f3f1a17b4bb232a20feb4e73.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/f0a532e15e232cb4b99a8d4d07c89575.png)
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2卷引用:黑龙江省大庆第一中学2019届高三第三次模拟考试数学(文)试题
5 . 已知直线l:x+y-6=0,过直线上一点P作圆x2+y2=4的切线,切点分别为A,B,则四边形PAOB面积的最小值为______ ,此时四边形PAOB外接圆的方程为______ .
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2019-05-27更新
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6 . 已知圆心为
的圆经过点
和
,且圆心
在直线
上,则圆
的方程为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c59f0e35b7ae5206e45878934482b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2932df2a491cd8f7441dd60e7a3c9a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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7 . 已知圆
,A(1,1)为圆内一点,P,Q为圆上的动点,且∠PAQ=
,M是PQ的中点.
(1)求点M的轨迹曲线C的方程;
(2)设
对曲线C上任意一点H,在直线ED上是否存在与点E不重合的点F,使
是常数,若存在,求出点F的坐标,若不存在,说明理由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08227ca941898eb34941f446ca8b1de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0468237bbc0d3df77435d98b817c10c0.png)
(1)求点M的轨迹曲线C的方程;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1681703437543bfc3e51898c466baac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5cfca209581cf3c7a4c6a8c384d8e3f.png)
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名校
8 . 已知圆
.
(1)若过点
的直线
被圆
截得的弦长为
,求直线
的方程;
(2)已知点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
为圆上的点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7a0753502ffbcf0c501ce3fed4e607b.png)
(1)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1242ec96ac54e2fd418988d5190a88.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/dc513f63a74ee3812ea543e1ae4bca3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b75d71cd9cb4254ffa82b7f06add125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04897ca48600b16fffd7d3102ab99e8f.png)
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2019-05-17更新
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2卷引用:【全国百强校】江西省上饶市玉山县第一中学2018-2019高一下学期期中考试(23-36班)数学(理)试题
2019·全国·三模
9 . 已知
在圆
上,点
关于
轴的对称点为
,点
关于
的对称点为
,则
的最小值为________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e159e211f2ad751bc1ffca35cc811ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaff41080fdea43eea7efedf9ebc1498.png)
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10 . 已知动点
到点
的距离是到点
距离的
倍.记点
的轨迹为曲线
.
(1)求曲线
的方程;
(2)记曲线
与
轴交于
两点,
.设
是直线
上任意一点,直线
与曲线
的另一交点分别为
.求证:
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e0b4cce429003557b051ea0fa2f7de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)记曲线
![](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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e0b4cce429003557b051ea0fa2f7de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03df57efff473b3cfeb8503796b7d6b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df13357406a0265b6d7c861fdd1d035c.png)
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2019-05-14更新
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2卷引用:【省级联考】山西省2019年高考考前适应性训练(三)文科数学试题