题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013652-15180.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013652-83877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013652-97673.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013653-22921.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013653-44641.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013653-20629.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013653-28924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013654-53952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013653-20629.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013653-28924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013654-29132.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013654-17156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013654-71247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013655-87319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013655-97650.png)
解析
试题分析:(1)先求出
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013655-96665.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013655-25899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013656-83864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013653-22921.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013656-11477.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013653-20629.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013653-28924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013656-18344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013656-75429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013656-61363.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013657-62356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013654-53952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013657-16646.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013657-51572.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013653-20629.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013653-28924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013653-20629.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013653-28924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013657-66808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013658-91724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013658-52266.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013658-61488.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013654-29132.png)
试题解析:(1)由题意得
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013658-39270.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013659-94744.png)
因为
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013653-22921.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013656-11477.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013654-17156.png)
(2)由题意得
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013659-31204.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013659-20436.png)
因为
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013654-53952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013657-16646.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013657-51572.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013659-99925.png)
由①②得
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013654-71247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013655-87319.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013654-71247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013700-15081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013700-18109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013700-22846.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013655-87319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013700-49722.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013701-28739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013700-22846.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013654-71247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013655-87319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013701-41771.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013644-44359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013644-34489.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013645-55337.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013645-70004.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013644-44359.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013637-65496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013637-91362.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013637-53484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013637-54185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013637-57232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013638-73203.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013633-69062.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013634-68654.png)
A.点M在线段AB上 | B.点B在线段AM上 |
C.点A在线段BM上 | D.O,A,M,B一定共线 |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013625-19391.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013625-45950.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013625-34936.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013626-52502.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013626-49732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013626-42429.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013613-57336.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013613-17153.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013613-70564.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013613-98002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013613-47833.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013614-62429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013614-61732.png)
A.5 | B.![]() | C.8 | D.![]() |
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