题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041736-62281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041736-10106.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041737-89413.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041737-74030.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041737-42207.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041737-11407.png)
解析
试题分析:因为
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041736-62281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041736-62281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041736-10106.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041737-89413.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041738-55764.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041736-10106.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041737-89413.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041737-74030.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041738-49627.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041738-42206.png)
核心考点
试题【已知为相互垂直的单位向量,若向量与的夹角等于,则实数_____.】;主要考察你对平面向量数量积的意义等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041732-49516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041732-88163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041727-50074.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041727-66738.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041727-25941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041728-53601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041719-82216.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041719-35918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041719-71803.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041719-28316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041720-53500.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041720-75719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041706-35907.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041707-35077.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041707-14648.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041707-36899.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041707-31493.png)
(2)求正整数
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041708-67828.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041708-83443.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041658-29822.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041659-86790.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041659-87341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041659-30305.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041659-24851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104041659-29840.png)
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