11-12高二下·浙江宁波·期中
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1 . 在△
中,
边长为
,
、
边上的中线长之和等于
.若以
边中点为原点,
边所在直线为
轴建立直角坐标系,则△
的重心
的轨迹方程为:___________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49e60fbe6820130fb20abc555a94b5ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f74b4600aec2c84cc0c3447574f11ce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
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2016-12-01更新
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4卷引用:青海省西宁市第五中学2016-2017学年高二上学期期末考试数学(文)试题
青海省西宁市第五中学2016-2017学年高二上学期期末考试数学(文)试题(已下线)2011-2012学年浙江省宁波万里国际学校高二下期中理科数学试卷2015-2016学年福建省四地六校高二上学期11月月考理科数学试卷福建省龙岩二中2018-2019学年高二上学期期中考试数学(理)试题
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2 . △ABC的两个顶点为A(-1,0),B(1,0),△ABC周长为6,则C点轨迹为
A.![]() | B.![]() |
C.![]() | D.![]() |
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3 . 已知动圆C与圆
及圆
都内切,则动圆圆心C的轨迹方程为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d126ba0c09568a82cbfb868ccd6c921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d2942dff583234d3a682316271e1e39.png)
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12-13高二上·浙江温州·期末
4 . 一个圆形纸片,圆心为
,
为圆内异于
的定点,
是圆周上一动点,把纸片折叠使
与
重合,然后抹平纸片,折痕为
,设
与
交于
,则
的轨迹是
![](https://img.xkw.com/dksih/QBM/2012/6/25/1570898119188480/1570898124480512/STEM/bd925bf4716d44e9bdf353aea15c2981.png)
![](https://img.xkw.com/dksih/QBM/2012/6/25/1570898119188480/1570898124480512/STEM/e22dc0e0d3b04616ad8998b68c7f8f84.png)
![](https://img.xkw.com/dksih/QBM/2012/6/25/1570898119188480/1570898124480512/STEM/bd925bf4716d44e9bdf353aea15c2981.png)
![](https://img.xkw.com/dksih/QBM/2012/6/25/1570898119188480/1570898124480512/STEM/15e07b489eab4b3bac27b56e11a9f7aa.png)
![](https://img.xkw.com/dksih/QBM/2012/6/25/1570898119188480/1570898124480512/STEM/15e07b489eab4b3bac27b56e11a9f7aa.png)
![](https://img.xkw.com/dksih/QBM/2012/6/25/1570898119188480/1570898124480512/STEM/e22dc0e0d3b04616ad8998b68c7f8f84.png)
![](https://img.xkw.com/dksih/QBM/2012/6/25/1570898119188480/1570898124480512/STEM/3e61cad3e5414226bed5cacc3bf416ba.png)
![](https://img.xkw.com/dksih/QBM/2012/6/25/1570898119188480/1570898124480512/STEM/3e61cad3e5414226bed5cacc3bf416ba.png)
![](https://img.xkw.com/dksih/QBM/2012/6/25/1570898119188480/1570898124480512/STEM/7aba77f7255f44f88f65109f1524f376.png)
![](https://img.xkw.com/dksih/QBM/2012/6/25/1570898119188480/1570898124480512/STEM/5aa455ae2a294d9bbfdf5ae4b84a114c.png)
![](https://img.xkw.com/dksih/QBM/2012/6/25/1570898119188480/1570898124480512/STEM/5aa455ae2a294d9bbfdf5ae4b84a114c.png)
A.双曲线 | B.圆 | C.抛物线 | D.椭圆 |
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5 . 在
中,
,给出
满足的条件,就能得到动点
的轨迹方程,下表给出了一些条件及方程:
则满足条件①、②、③的点
轨迹方程按顺序分别是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed711e2096f27c6459578cd7b93dd8e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
条件 | 方程 |
①![]() | ![]() |
②![]() | ![]() |
③![]() ![]() | ![]() |
则满足条件①、②、③的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
A.![]() ![]() ![]() | B.![]() ![]() ![]() |
C.![]() ![]() ![]() | D.![]() ![]() ![]() |
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3卷引用:2013-2014学年吉林省吉林市普通高中高二上学期期末理数学试卷
(已下线)2013-2014学年吉林省吉林市普通高中高二上学期期末理数学试卷 2.1.1椭圆及其标准方程 练习-2022-2023学年高二上学期数学北师大版(2019)选择性必修第一册福建省厦门第六中学2023-2024学年高二上学期期中考试数学试题