题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045230-98333.png)
A.![]() ![]() | B.![]() | C.![]() | D.![]() |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045231-72016.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045231-25186.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045231-61030.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045231-64377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045232-65130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045232-74392.png)
解得
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045232-50271.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045230-76656.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045231-25186.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045230-59964.png)
核心考点
举一反三
设
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045223-53508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045223-16817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045223-53224.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045224-54892.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045224-44716.png)
(Ⅱ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045224-76997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045211-44078.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045212-32796.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045212-45513.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045212-33954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045212-84276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045212-48918.png)
(1)求向量
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045212-64626.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045213-61550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045212-32796.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045213-79597.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045213-29702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045204-49943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045204-23362.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045204-85893.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045204-13099.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045205-62055.png)
(I)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045205-83183.png)
(II)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045205-21226.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045204-13099.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045156-51040.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045156-28356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045156-81815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045156-11384.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045156-37898.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045156-33773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045157-89810.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045157-37664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045150-37777.png)
A.锐角三角形 B.直角三角形
C.等腰三角形 D.等腰或直角三角形
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