题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020446-25866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020446-10033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020447-76979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020447-36768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020447-17254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020447-63135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020448-55185.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020446-25866.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020448-15175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020446-10033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020448-21909.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020448-48526.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020446-10033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020449-82728.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020449-76089.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020449-88777.png)
解析
试题分析:(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020446-25866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020446-25866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020446-10033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020447-76979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020447-36768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020447-17254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020447-63135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020448-55185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020449-38504.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020450-64592.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020450-16475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020450-92207.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020446-25866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020448-15175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020446-10033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020448-21909.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020448-15175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020450-22905.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020448-15175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020446-10033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020448-21909.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020448-48526.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020446-10033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020450-37506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020451-39661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020451-63039.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020449-82728.png)
试题解析:(1)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020447-63135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020449-38504.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020450-16475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020451-75309.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020449-76089.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020451-35318.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020451-33859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020452-22376.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020452-38796.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020452-41044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020448-48526.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020446-10033.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020451-63039.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020452-52599.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020453-82036.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020453-24498.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020453-40585.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020449-88777.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020411-67084.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020411-67084.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020411-68438.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020411-79830.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020411-51933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020411-16744.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020305-55706.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020306-54004.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020306-39195.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020203-20685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020203-80909.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020203-40736.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020203-62596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020204-65706.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020204-27324.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020204-92393.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020133-99474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020133-67486.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020134-96320.png)
A.8 | B.21 | C.28 | D.35 |
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020123-11619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020124-14991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020124-29282.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020124-59698.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020124-80498.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020124-70766.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009020125-91181.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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