题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093837-56247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093837-59931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093837-59339.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093838-56984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093838-92563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093837-56247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093838-92529.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093838-36767.png)
答案
解:(I)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093839-58829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093838-92563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093839-39041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093839-46288.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093839-47801.png)
两式相减得:
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093840-84136.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093839-47801.png)
得
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093840-78068.png)
由于
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093840-59040.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093840-41253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093840-87925.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093839-47801.png)
又由
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093841-53589.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093841-68935.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093841-91223.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093837-56247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093841-86237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093838-92563.png)
(II)由(I)得
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093842-88766.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093842-15352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093842-77542.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093842-10913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093843-43185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093843-21067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093843-73241.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093843-95828.png)
故
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093843-21805.png)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093832-56761.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093832-12288.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093833-91776.png)
A.![]() | B.-8 | C.8 | D.64 |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093821-24795.png)
A.![]() | B.(一∞,![]() | C.![]() | D.(一1,![]() |
A.0 | B.3 | C.8 | D.11 |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093803-88447.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093803-22347.png)
A.2 | B.4 | C.8 | D.16 |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093755-19697.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093756-89479.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093756-80230.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093756-73352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093756-63544.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014093757-55870.png)
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