解题方法
1 . 下列结论正确的个数是( )
①已知点
,则
外接圆的方程为
;
②已知点
,动点
满足
,则动点
的轨迹方程为
;
③已知点
在圆
上,
,且点
满足
,则点
的轨迹方程为
.
①已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89780c359f18edf742976d29217d09bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad28f9d7e72a9b00ca161bcaf53b61e.png)
②已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6512786f74fd2c0a09318d6bad2a013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab34ce6cee0673ab0d37b660d57bc07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8058d9c175147b0908679fca83e5a2ba.png)
③已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc12c55f2676aeb4f696f4a84e4d65b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48dd265635ffeaa560c982391c8991a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a813773c21f965b609624ba9273125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b84df2d39fa36c3f4ee72a0817fd2b25.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次