题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034237-23260.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034237-12187.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034237-93090.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034237-17684.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034237-93090.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034238-67838.gif)
A.![]() | B.2—![]() | C.2+![]() | D.1+![]() |
答案
解析
核心考点
举一反三
已知数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034233-59683.gif)
(1)试求a的取值范围,使得
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034233-83205.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034234-31458.gif)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034234-80571.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034234-48623.gif)
已知首项不为零的数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034219-68545.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034219-67176.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034219-48050.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034220-62119.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034220-80916.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034220-53927.gif)
(Ⅰ)判断数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034219-68545.gif)
(Ⅱ)若数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034220-13549.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034219-67176.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034220-11147.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034219-68545.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034221-47384.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034221-47433.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034221-79979.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034221-19313.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034220-13549.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034219-67176.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034222-53512.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034215-56020.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034215-17293.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034215-65570.gif)
|
设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034204-88085.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034204-65195.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034204-64189.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034204-65195.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034204-32369.gif)
(I) 求
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034205-84179.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034205-27687.gif)
(II) 求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034204-88085.gif)
(III)令
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034205-22566.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034205-71692.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034206-29610.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034206-89291.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034206-35645.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034206-54373.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034155-53267.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034155-69903.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034155-17892.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034156-99454.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034156-40858.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034156-34254.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034156-69932.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034156-63750.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034157-18714.gif)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034155-53267.gif)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034157-62905.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034157-99393.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034157-40897.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034155-17892.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034156-40858.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013034157-99393.gif)
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