已知圆C的方程为:
.
(1)若直线
与圆C相交于A、B两点,且
,求实数a的值;
(2)过点
作圆C的切线,求切线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4561bfcd66d795bb656b2c190e44217.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4eaea2bcc76dbf8cb19729ae99a5683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699fc9b7e879af4866aaa07848dfb423.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff2595e01e8751886a27862cce04e2d1.png)
更新时间:2024-01-23 20:34:37
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知圆E经过点
,
,且与y轴相切.
(1)求圆E的方程;
(2)求过点
的圆E的切线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cb9e88d3e58141dba299dcd8edc4e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baca988e757625c577e02752422a72d.png)
(1)求圆E的方程;
(2)求过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d00d5d8cc31aaca7fc2eafb99eac7629.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,圆
,点
为直线
上一动点,过点
引圆
的两条切线,切点分别为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/c5557970-7d98-448b-8d4d-2b2b04c4d8fe.png?resizew=180)
(1)若
,求两条切线所在的直线方程;
(2)求直线AB的方程,并写出直线AB所经过的定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42103f88b80e7ef8bb12c7b839990a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce26989fb027f96bc5384b7317d68c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4180dae966f648d368a10edf3b7e3c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/c5557970-7d98-448b-8d4d-2b2b04c4d8fe.png?resizew=180)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2a51944c720568f35d443589dfc1aa.png)
(2)求直线AB的方程,并写出直线AB所经过的定点的坐标.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】已知直线
,
,圆
.
(1)证明:直线
恒过一定点
;
(2)证明:直线
与圆
相交;
(3)当直线
被圆
截得的弦长最短时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e26f48978c009cf9ae5ad716634f24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1cd21b824fcf58c75911fb165306d3.png)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)当直线
![](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/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
【推荐2】在平面直角坐标系xOy中,函数
的图象与坐标铀的交点都在圆C上.
(1)求圆C的方程;
(2)若经过点
的直线l被圆C截得的弦长为4,求直线l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/620fff76456e4080c41c51661171c66f.png)
(1)求圆C的方程;
(2)若经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69abe959988e4c8c0739f5857ccfb0f.png)
您最近一年使用:0次