题目
题型:解答题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032019-25893.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032019-90522.png)
证明:(1)存在唯一
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032019-27521.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032019-76823.png)
(2)存在唯一
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032020-23620.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032020-78899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032020-54564.png)
答案
解析
试题分析:(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032020-51972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032020-92610.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032020-26809.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032021-52996.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032021-51833.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032019-27521.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032019-76823.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032021-11017.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032021-19772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032021-68135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032022-56099.png)
记
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032022-52596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032022-62314.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032022-84512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032022-79611.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032023-98562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032023-97082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032023-95839.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032023-27524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032023-48926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032024-40225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032024-58077.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032023-27524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032024-10930.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032024-45765.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032023-27524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032024-42504.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032025-94946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032025-61659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032025-94946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032025-61659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032025-33026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032025-22468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032025-38482.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032026-46647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032026-91368.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032026-83046.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032020-23620.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032020-78899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032026-88619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032020-54564.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032020-51972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032026-83979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032020-26809.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032021-52996.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032027-99855.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032019-27521.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032019-76823.png)
(2)考虑函数
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032027-41616.png)
令
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032021-19772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032021-68135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032022-56099.png)
记
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032027-35812.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032022-62314.png)
有(1)得,当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032022-84512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032022-79611.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032023-98562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032023-97082.png)
在
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032023-95839.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032023-27524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032023-48926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032024-40225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032024-58077.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032023-27524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032024-10930.png)
在
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032024-45765.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032023-27524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032024-42504.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032025-94946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032025-61659.png)
所以存在唯一的
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032025-94946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032025-61659.png)
因此存在唯一的
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032025-33026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032025-22468.png)
因为当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032025-38482.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032026-46647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032026-91368.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032026-83046.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032020-23620.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032020-78899.png)
因
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032026-88619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032020-54564.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032015-55448.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032015-15468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032016-32234.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032016-35571.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032016-17220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032013-78299.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032011-84805.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032006-42608.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818032003-66596.png)
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