题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-65324.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-49845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-33554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-29166.png)
A.(![]() ![]() ![]() | B.(![]() ![]() ![]() |
C.(![]() ![]() ![]() | D.(![]() ![]() ![]() |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113713-65519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-49845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113713-91984.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-49845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113713-40183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113714-13094.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113714-37163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113714-87049.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-49845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113713-20873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-33554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-49845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-29166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-49845.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113713-20873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-49845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-33554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-29166.png)
由OG=3GG1知,
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-65324.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113714-39628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-68699.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-49845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-33554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-29166.png)
∴(x,y,z)=(
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-68699.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-68699.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113712-68699.png)
核心考点
试题【设OABC是四面体,G1是△ABC的重心,G是OG1上一点,且OG=3GG1,若=x+y+z,则(x,y,z)为( )A.(,,)B.(,,)C.(,,)D.】;主要考察你对空间向量的基本概念等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113703-48795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113703-76861.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113704-75334.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113648-15143.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113649-16167.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113649-16778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105113644-31127.png)
A.![]() | B.![]() | C.-![]() | D.-![]() |
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