题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070444-57455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070444-18873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070444-64084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070445-72100.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070445-35820.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070445-81315.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070445-46325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070446-41218.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070445-81315.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070446-50489.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:设数列的首项为
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070447-31187.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070444-57455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070447-20079.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070447-31681.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070447-31187.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070447-20079.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070444-18873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070448-32815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070448-94056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070448-97849.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070448-92298.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070438-34069.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070438-14828.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070439-36141.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070439-18557.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070439-22173.png)
A.2 | B.3 | C.5 | D.7 |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070416-76026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070416-70661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070416-76026.png)
A.81 | B.120 | C.168 | D.192 |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070405-63899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070405-95877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070405-77454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070405-82762.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070405-85445.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070353-10601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070353-86153.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070346-96682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070346-89888.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014070346-99113.png)
A.8 | B.-8 | C.8或-8 | D.10 |
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