题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003739-79444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003739-45716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003740-97889.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003740-53357.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003740-82777.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003740-27481.png)
(1)判断数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003740-72929.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-11936.png)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-58789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-31620.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-83641.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-22121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-61184.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-83641.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003740-72929.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003742-53021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003742-45718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003742-23693.png)
解析
试题分析:(1)将数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003739-79444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003740-53357.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003742-92276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003740-72929.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003740-72929.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003739-79444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003743-27622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003739-79444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-22121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-22121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003743-24868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003743-61902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003743-15115.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003743-17176.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-22121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-61184.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-83641.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-22121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-61184.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-83641.png)
试题解析:(1)由
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003744-61669.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003744-89450.png)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003744-59399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003744-56395.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003744-31396.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003745-38159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003745-31118.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003745-88374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003745-42110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003746-10563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003746-34090.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003745-38159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003746-40000.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003746-53920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003740-82777.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003746-10563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003746-16867.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003747-57482.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003758-26850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003758-18803.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003758-16271.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003745-38159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003758-48470.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003759-92445.png)
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003759-28392.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003746-10563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003741-58789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003809-99655.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003810-45466.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003810-64110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003746-10563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003810-23349.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003821-37743.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003821-81732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003821-38218.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003822-89646.png)
而当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003743-61902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003822-86848.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003743-15115.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003822-45394.png)
综上所述,
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003742-23693.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003727-43513.jpg)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003727-17454.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003728-30021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003717-24584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003717-32614.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003718-58420.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003717-32614.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003718-85153.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003718-73804.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003717-24584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003718-15213.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003718-67931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003718-51038.png)
(2)设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003719-76664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003719-28174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003719-78548.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003657-43177.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003657-94476.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003658-13885.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003658-95637.png)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003657-94476.png)
(Ⅱ)若数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003658-68851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003658-61664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003650-29751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003650-92872.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003650-24907.png)
A.2 | B.![]() | C.1 | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003612-94018.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003612-75573.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003612-60243.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003612-38980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003612-38980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003613-50999.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003613-48315.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003613-66172.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003613-66172.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003613-48315.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003613-81145.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003613-53723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003613-53723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003614-50288.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003614-17124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003620-63308.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003620-63308.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003613-48315.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003620-46330.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003620-55194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003612-38980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003614-50288.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003620-27571.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003621-99113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003621-84418.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003621-80733.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003621-80518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003621-15749.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003622-42126.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003622-95573.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003622-95280.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003622-48519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003622-95573.png)
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