题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-99957.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-54689.png)
①当
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-68092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-99957.png)
②当
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-49529.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-99957.png)
③当
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085123-16580.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-99957.png)
④当
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085123-74232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-99957.png)
A.①② | B.②④ | C.③④ | D.②③ |
答案
解析
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085123-53981.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085123-97642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085124-17256.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085124-91758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085124-51507.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085124-17325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085125-68666.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085125-54185.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-68092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085125-91178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085125-47206.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085126-90047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-99957.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-49529.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085126-50718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-99957.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085123-16580.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085126-86570.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-99957.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085123-74232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085126-89782.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085127-63472.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085127-22080.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-68092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085127-84119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-99957.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-99957.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-49529.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085127-70926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085128-82852.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085128-45329.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085128-45964.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085147-33733.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085147-21997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085122-99957.png)
核心考点
试题【已知数列满足下面说法正确的是( )①当时,数列为递减数列;②当时,数列不一定有最大项;③当时,数列为递减数列;④当为正整数时,数列必有两项相等的最大项.A.①】;主要考察你对等差数列等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085045-68952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085045-62502.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085046-58991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085046-67406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085002-24085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085002-21946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085002-96597.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085003-93475.png)
(Ⅱ)判断数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085002-24085.png)
(Ⅲ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085003-47907.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009085003-68980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084852-31882.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084852-64949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084852-91471.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084852-31882.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084852-74841.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084852-49571.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084852-93261.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084853-19322.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084825-75613.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084826-22397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084826-91747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084826-56885.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084826-22397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084826-43801.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084825-75613.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084827-68034.png)
(Ⅰ)若数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084825-75613.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084827-71210.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084827-31760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084825-75613.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084827-68034.png)
(Ⅱ)若数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084825-75613.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084825-75613.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084827-68034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084826-22397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084827-73532.png)
(Ⅲ)若数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084825-75613.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084825-75613.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084827-68034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084828-99637.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084828-60786.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009084652-47240.png)
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