1 . 平面直角坐标系中,等边
的边长为
,M为BC中点,B,C分别在射线
,
上运动,记M的轨迹为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a1b72379b3b15175d1927dd6b0271c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79301e3963cf05b1ac7c249749420475.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2 . 已知动圆M和圆
:
内切,并和圆
:
外切,则动圆圆心M的轨迹是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c7d7813e745dae3eb430e793a0dddbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd6d5018b988d9843479cfdcfd3a522d.png)
A.直线 | B.圆 |
C.焦点在![]() | D.焦点在![]() |
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2024-03-21更新
|
434次组卷
|
3卷引用:湖南省衡阳市衡阳县第一中学2023-2024学年高二下学期4月期中考试数学试题