题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043903-55665.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043904-74000.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043904-49821.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043904-66806.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043904-63938.gif)
(1)求实数
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043904-76056.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043904-66806.gif)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043905-19661.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043905-67799.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043905-39905.gif)
解析
(1)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043905-67577.gif)
不论
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043906-46554.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043906-54978.gif)
即对
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043906-36112.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043906-47915.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043905-67799.gif)
(2)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043906-96277.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043907-12884.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043907-32890.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043907-33320.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043907-33218.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043908-72504.gif)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043908-41753.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043908-99277.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043905-39905.gif)
(3)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043908-35926.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043908-16367.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043909-14597.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043852-90993.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043852-49647.gif)
(1)令
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043852-77520.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043853-95570.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043853-38100.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043838-35443.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043838-48691.gif)
⑴求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043838-56782.gif)
⑵设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043838-17393.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043839-68066.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043839-95287.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043824-51386.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043824-46691.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043824-64262.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043824-28323.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043825-57221.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043824-51386.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043825-96055.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043825-52905.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043825-18438.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043811-79460.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043811-80687.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043811-64530.gif)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043811-79460.gif)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043812-65659.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043812-25311.gif)
(Ⅲ)设计一个求
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043812-25311.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043800-29304.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043800-22319.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043800-22319.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043800-22319.gif)
(Ⅰ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043800-86320.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043801-29063.gif)
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