2022高三·全国·专题练习
1 . 设点M、N分别是不等边
的重心与外心,已知
、
,且
.则动点C的轨迹E______ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42a2b8b43e1fe82fc439d145e91b860c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b85e18c733a3666a8a62b2f3df9a2692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b767a6444246a0eb1de6f2ec75c54654.png)
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解题方法
2 . 在菱形
中,
,
,
,
是菱形
内部及边界上一点,则
的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c47d485ef4af550b6fc5760d7cb84e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c0563f7e0879e8fbe9e02502992b82f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4273f578c25521f9a653ff01e058f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e057c31608d8a78166c09ddeb3a5a3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-07-31更新
|
266次组卷
|
4卷引用:黑龙江省双鸭山市第一中学2021-2022学年高二上学期开学考试数学试题
3 . 已知向量
=(1,1,0),
=(﹣1,0,2)且k
+
与2
﹣
互相垂直,则k的值是
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/2091ca1c9c604c2d902c75c82e4179c6.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/7820e57fb0414345ad7512debbe11f30.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/28db5c088b9b4c478b62fc31ce9d3b44.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/cc6ba9b8b37843649769aa4c65614d76.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/28db5c088b9b4c478b62fc31ce9d3b44.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/cc6ba9b8b37843649769aa4c65614d76.png)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
209次组卷
|
4卷引用:2015-2016学年黑龙江省双鸭山一中高二上10月月考理科数学试卷
4 . 已知空间四边形ABCD,F为BC的中点,E为AD的中点,若
=λ(
+
),则λ=
![](https://img.xkw.com/dksih/QBM/2016/2/25/1572499426279424/1572499431636992/STEM/614cf0730ed24e52b74add4a05ef63ae.png)
![](https://img.xkw.com/dksih/QBM/2016/2/25/1572499426279424/1572499431636992/STEM/ccafea807181423590572910aa0bcf56.png)
![](https://img.xkw.com/dksih/QBM/2016/2/25/1572499426279424/1572499431636992/STEM/d50cef3e94a34bcb9817d6c31f62092b.png)
![](https://img.xkw.com/dksih/QBM/2016/2/25/1572499426279424/1572499431636992/STEM/52211717b7b546478dd59f2080b5d598.png)
![](https://img.xkw.com/dksih/QBM/2016/2/25/1572499426279424/1572499431636992/STEM/614cf0730ed24e52b74add4a05ef63ae.png)
A.![]() | B.![]() | C.1 | D.![]() |
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