题目
题型:不详难度:来源:
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012919-94658.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012920-15913.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012920-37307.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012920-52205.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012920-33125.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012921-23678.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012921-11905.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012921-65935.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012920-33125.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012921-39347.gif)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012920-15913.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012920-33125.gif)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012921-71491.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012922-19561.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012922-37109.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012922-21789.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012920-52205.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012922-30038.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012923-55185.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012923-11795.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012923-54399.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012923-25201.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012924-90222.gif)
又∵
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012924-59585.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012924-39471.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012924-39498.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012924-36671.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012925-56723.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012921-23678.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012925-79017.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012920-33125.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012922-37109.gif)
(2)证明:依题意
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012925-59493.gif)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012925-41000.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012926-48310.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012926-27062.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012926-33254.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012926-51693.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012927-21721.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012911-29088.gif)
A.34 | B.35 | C.36 | D.37 |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012852-21876.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012852-67021.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012853-32162.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012853-45241.gif)
A.99![]() | B.49 | C.102 | D.101 |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012846-46045.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012847-83691.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012847-93778.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012847-53592.gif)
A.130 | B.150 | C.170 | D.210 |
A.180 | B.-180 | C.90 | D.-90 |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012821-78394.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013012821-85051.gif)
A.3 | B.4![]() | C.5![]() | D.6 |
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