题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033334-99024.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033334-81598.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033334-88232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033334-46760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033335-22410.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033334-99024.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033335-62281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033335-68707.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
对任意的
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033334-88232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033334-46760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033335-22410.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033336-28168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033337-25249.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033337-16487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033334-81598.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033337-80978.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033335-62281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033335-68707.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033335-38612.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033331-75726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033331-12323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033331-36223.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033331-78876.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033331-75726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033331-74751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033331-78876.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033331-74751.png)
A.21 | B.20 | C.19 | D.18 |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033328-61790.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033317-78831.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033318-71928.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033318-16078.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033318-83640.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033318-44144.gif)
(理)已知数列{a
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033307-62006.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033307-50889.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033307-26461.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033307-87728.gif)
(1)求a
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033307-66720.gif)
(2)设b
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033307-26461.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033308-66571.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033307-62006.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033307-26461.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033259-96667.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033259-95526.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033259-33814.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033259-77465.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033300-72362.gif)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033300-19526.gif)
(2)令
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033300-30238.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033300-12585.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033300-39393.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033301-64136.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013033301-44041.gif)
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