题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073106-65806.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073106-70661.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073106-33250.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073106-44723.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073107-16568.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073107-48497.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073107-66175.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073107-12763.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073107-22775.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073107-29649.gif)
(1) 求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073107-59603.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073107-81113.gif)
(2) 求异面直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073108-65722.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073108-43698.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073108-81472.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073108-92535.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073108-21861.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073108-68774.gif)
又∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073109-22952.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073107-22775.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073107-29649.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073109-48962.gif)
∴四边形
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073109-31221.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073110-26185.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073110-50297.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073107-81113.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073110-72868.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073107-81113.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073110-13365.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073107-81113.gif)
(2)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073110-82862.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073106-70661.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073111-35758.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073106-70661.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073111-58272.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073106-70661.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073111-20732.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073111-27736.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073106-33250.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073112-85546.gif)
以点E为坐标原点,
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073112-85546.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073112-76539.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073112-88397.gif)
由已知得,
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073112-18796.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073112-21262.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073113-94966.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073113-57294.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073113-77438.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073113-97729.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073114-70070.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073108-65722.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073108-43698.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073114-97087.gif)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073049-69462.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073049-27884.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073049-74114.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073049-64040.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073050-24877.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073050-56333.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073050-74802.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073050-85071.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073051-27489.gif)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073051-76520.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073051-67808.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073051-81242.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073033-79911.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073033-75486.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073034-85784.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073034-53647.gif)
(1)求证:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073034-48354.gif)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073034-33407.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073033-79911.gif)
柱
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073033-75486.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073034-15271.gif)
(i)当点C在圆周上运动时,求
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073034-15271.gif)
(ii)记平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073035-42759.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073035-21518.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073035-37921.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073035-39499.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073034-15271.gif)
取最大值时,求
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073036-11085.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073036-78409.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073023-30134.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073023-44048.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073023-22467.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073023-23182.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073024-30544.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073023-23182.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073024-30544.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073023-30134.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073013-81919.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073013-16874.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073013-89577.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073013-58552.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073013-63861.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073013-94747.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073014-49760.gif)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073014-60220.gif)
(2)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073014-84110.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073014-38605.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072959-25854.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073000-46865.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073000-97133.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073000-44249.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073000-97133.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073000-44249.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073000-74168.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073000-12636.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073000-82307.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073000-23709.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073000-11516.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073000-23709.gif)
(1)求证:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073000-30608.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073001-85819.gif)
(2)求三棱锥
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073001-22108.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073001-47876.jpg)
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