名校
1 . 已知两圆
和
.
(1)把圆
化成标准方程;
(2)试求当
为何值时,两圆
和
相切.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0c900ae6e90e1825d0c80f90a7096e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03b5aba40ffdcf42549e9808bfd63c6e.png)
(1)把圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)试求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
您最近一年使用:0次
2 . 已知
的顶点坐标分别是
,
,
.
(1)求
外接圆的方程,并求这个圆的半径和圆心坐标;
(2)已知直线
与
的外接圆相交于
两点,求弦
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ab9896fc3ea81ed083e983d4e0767eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e290ff77a4be2effb6e73d92c6d48064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c012ddf3e1fe09c3ee41881cd603212.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baabfd32465e9e50409413d9c1358279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
您最近一年使用:0次