已知圆C的方程为x2﹣2x+y2﹣3=0.
(1)求过点(3,2)且与圆C相切的直线方程;
(2)若直线y=x+1与圆C相交于A,B,求弦长|AB|的值.
(1)求过点(3,2)且与圆C相切的直线方程;
(2)若直线y=x+1与圆C相交于A,B,求弦长|AB|的值.
20-21高二下·上海浦东新·期中 查看更多[9]
更新时间:2023-03-23 22:37:46
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适中
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【推荐1】已知圆
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外,过
作圆
的切线,设切点为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4559e8b5861ebbf7c0f5c6d9a819f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)求满足条件
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996fcb18cc81196eb17f44844a4fb91e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】已知圆
:
.
(1)过点
作圆
的切线
,求切线
的方程;
(2)设过点
的直线
与圆
交于
,
两点,若点
、
分圆周得两段弧长之比为
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c560968a9e9443bec3accf223c1974.png)
(1)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46907122ff613758e61501e672097c58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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(2)设过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37bbde2076bfa6dd859f7787e155ab8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab4717e4827480f0f6f4ded85e52eab.png)
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【推荐1】已知圆C:
.
(1)过
的动直线l与圆C:
交于A、B两点.若
,求直线l的方程;
(2)从圆C外一点Q向该圆引一条切线,切点为M,若
(O为坐标原点),求动点Q的轨迹方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c82a1fed135888e1c072bc5078fc8a5.png)
(1)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c9708ef0dc6d6f5dcf6596d3e4f6e5.png)
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(2)从圆C外一点Q向该圆引一条切线,切点为M,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d8f5281f1f036de2d3a737a70d21ae7.png)
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解题方法
【推荐2】在平面直角坐标系
中,已知圆
和圆
.
(1)若直线
过点
,且与圆
相切,求直线
的方程;
(2)设
为直线
上的点,满足:过点
的无穷多对互相垂直的直线
和
,它们分别与圆
和圆
相交,且直线
被圆
截得的弦长与直线
被圆
截得的弦长相等.试求满足条件的点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
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(1)若直线
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(2)设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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