题目
题型:不详难度:来源:
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001009-84078.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001009-81356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001009-67011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001010-80145.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001009-84078.png)
答案
解析
试题分析:若点P在α、β两平面内的部分,则可得
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001010-34274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001010-48935.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001010-13194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001010-60554.png)
核心考点
试题【已知平面α∥平面β,P是α、β外一点,过点P的直线m分别与α、β交于A、C,过点P的直线n分别与α、β交于B、D,且PA=6,AC=9,PD=8.则BD的长为(】;主要考察你对圆锥曲线性质探讨等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001000-38510.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001000-54840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001000-51749.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001000-87761.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001000-87761.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001000-38248.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001000-42052.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001000-38643.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001000-44826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001001-91128.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001001-12080.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001001-98381.png)
(1)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001001-76130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001001-64453.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001001-46865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000945-18587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000945-39551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000946-96790.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000946-12673.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000946-12673.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000946-93676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000946-51123.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000946-46411.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000946-86783.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000947-17810.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000947-70729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000947-14238.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000947-67456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000947-33995.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000947-99894.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000940-94472.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000932-41395.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000932-82590.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000932-98915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000932-82590.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000932-72436.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000932-82590.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000932-41395.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000933-24840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000932-72436.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000933-97454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000933-46815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000933-46815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000933-59570.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000934-91170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000934-56496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000925-95529.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108000925-93442.png)
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