名校
解题方法
1 . 已知点
是曲线
(其中a,b为常数)上的一点,设M,N是直线
上任意两个不同的点,且
.则下列结论正确的是______ .
①当
时,方程
表示椭圆;
②当
时,方程
表示双曲线;
③当
,
,且
时,使得
是等腰直角三角形的点
有6个;
④当
,
,且
时,使得
是等腰直角三角形的点
有8个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/296f6b73bcb1ea61bff5367a9a918613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ef43a8e403c744851ebda3610ddd45.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d5f0d374837655cc286d326305da36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/296f6b73bcb1ea61bff5367a9a918613.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ed37ee7432002cd0e0978b2012e184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/296f6b73bcb1ea61bff5367a9a918613.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ad03c9d3ac3b7cc9952979532b2415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a7551d073a061eef22c9e127d6deeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15a13b4190ac3d5feaee27a4c97b21b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ad03c9d3ac3b7cc9952979532b2415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a7551d073a061eef22c9e127d6deeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0fed6f944ef4b07f7e33ca893581fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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2023-01-06更新
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2卷引用:北京市东城区2022-2023学年高二上学期期末考试数学试题