解题方法
1 . 已知椭圆:
,不过点
的动直线l交椭圆于A,B两点,且
,则直线l过定点__________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69daca955a565fa537347dd0d93783f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c57707d27bbd262253fe066f3598ac2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d643e10124279e8863fe3e21cba688b.png)
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2 . 已知点
,
在圆
上,则使
的点
的个数为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5110b9eaf1d844991aa9064859edd89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62963f2a96f76abd99cd8e1a8e2341f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44c103cf57cf9ab2dee6c5a0ce32f54d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次