题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062707-97486.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062708-65472.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062708-65587.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062708-61255.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062708-35828.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062709-92480.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062709-31560.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062707-97486.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062708-61255.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062709-66105.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062709-94406.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062708-35828.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062710-89839.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062710-89839.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062707-97486.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062708-65472.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062708-65587.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062710-58339.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062710-92219.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062710-44714.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062710-41947.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062711-54909.gif)
在
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062708-61255.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062709-31560.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062711-31057.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062711-69297.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062711-84520.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062712-34801.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062709-31560.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062712-50369.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062712-73182.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062712-66988.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062708-61255.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062712-33251.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062711-54909.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062713-76501.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062713-24911.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062713-95698.gif)
①-②得
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062713-47015.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062714-54150.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062714-65809.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062714-17416.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062714-71091.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062711-54909.gif)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062513-99934.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062513-72905.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062513-55596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062513-31462.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062514-11861.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062513-31462.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062444-12543.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062445-19392.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062445-43593.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062445-49807.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062332-36986.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062332-87894.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062332-33593.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062333-96518.gif)
(1)证明
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062332-36986.gif)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062333-52527.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062333-69156.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062202-72903.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062202-31295.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062202-73427.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062202-72611.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062203-82139.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062131-21730.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062132-17445.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062132-94471.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062132-49153.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062132-95561.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062138-22010.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062139-49091.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062131-21730.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062132-49153.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062139-28762.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062139-48842.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062132-95561.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062139-56143.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011062139-56143.gif)
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