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1 . 若曲线C上存在点M,使M到平面内两点
,
距离之差的绝对值为8,则称曲线C为“好曲线”.以下曲线是“好曲线”的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d71fb4d3db6c9922d3b605a6d40e529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fe2c124d5bbbbe666ee145cd454b6b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-02-09更新
|
385次组卷
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4卷引用:广东省江门市2022-2023学年高二上学期调研(一)数学试题
广东省江门市2022-2023学年高二上学期调研(一)数学试题黑龙江省富锦市第一中学2022-2023学年高二下学期第一次考试数学试题海南省琼海市四校大联考2023届高三12月数学科试题(已下线)专题3.2 双曲线(5个考点十大题型)(1)
解题方法
2 . 已知椭圆
和双曲线
的焦距相同,且椭圆
经过点
,椭圆
的上、下顶点分别为
,点
在椭圆
上且异于点
,直线
与直线
分别交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/75b1b072-1e3b-4a1a-80fe-44f13c992955.png?resizew=204)
(1)求椭圆
的标准方程;
(2)当点
运动时,以
为直径的圆是否经过
轴上的定点?请证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acca1c00ee33a8d7aabf1d626541259e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e454c7161999e2a67138869f59d319b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b6074284a3d33225adde446bed11b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fec96b5e74f5c2915a1d34d0fdeb737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/75b1b072-1e3b-4a1a-80fe-44f13c992955.png?resizew=204)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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