题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154008-80145.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154008-20570.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154008-31235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154009-39090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154008-31235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154009-69751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154009-18712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154010-53817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154010-93131.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154008-80145.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154009-18712.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154010-30933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154010-45795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154008-20570.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154010-32430.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154011-13111.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154011-27711.png)
解析
试题分析:(1)应用
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154011-15386.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154009-39090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154012-15975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154012-94824.png)
试题解析:(1)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154009-39090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154008-31235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154009-69751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154012-13444.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154013-95405.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154013-88271.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154013-25783.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154013-21780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154014-27008.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154014-27192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154014-26442.png)
∴数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154008-80145.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154013-25783.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154014-63088.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154014-42898.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154015-44791.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154009-18712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154015-93270.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154015-33311.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154015-95259.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154016-34568.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154016-13457.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154016-15830.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154016-55803.png)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154017-42548.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154017-75581.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154017-64516.png)
∴数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154017-86365.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154018-68713.png)
综上所述,
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154011-13111.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009154008-20570.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153933-22755.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153933-94878.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153934-11608.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153934-23674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153934-33168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153934-91079.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153933-22755.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153933-22755.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153934-11608.png)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153935-42371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153935-24157.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153935-76027.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153935-83704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153936-84396.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153936-26520.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153925-23407.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153925-14343.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153925-39405.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153926-57337.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153926-14741.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153925-23407.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153926-54256.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153926-75518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153910-37965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153910-41470.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153911-30464.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153911-20467.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153911-52245.png)
A.11 | B.16 | C.20 | D.28 |
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153858-32157.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153858-57770.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153858-36236.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153859-42824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153859-53806.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153858-32157.png)
(2)设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153859-94156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153900-82147.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153900-27982.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153900-98032.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153858-36236.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153900-81837.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153442-89232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153442-17401.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153443-42630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153443-19170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153443-76228.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009153443-40042.png)
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