11-12高三·山东日照·阶段练习
1 . 已知数列
为等差数列且
,则
的值为
![](https://img.xkw.com/dksih/QBM/2013/5/15/1571214996791296/1571215002116096/STEM/7a6eaf704f0b4290bd50d44290473f70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff841596b9a340cfb0d08796e5b766a.png)
![](https://img.xkw.com/dksih/QBM/2013/5/15/1571214996791296/1571215002116096/STEM/01a558f742f840c2bc686b02ea8c14f6.png)
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11-12高二上·云南昆明·期末
名校
2 . 已知数列
的前
项和为
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a6f2d66aac36eff31032524cc45a5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492969c502a62326a3c672549d61e0da.png)
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2014·内蒙古鄂尔多斯·一模
3 . 已知
是由正数组成的等比数列,
表示
的前
项的和,若
,
,则
的值是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/188c2fd902ad57934546c85cddccb64e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27182444d3da4003680f07ec299087c.png)
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2014-04-28更新
|
1876次组卷
|
3卷引用:2014届内蒙古鄂尔多斯市高三下学期模拟考试理科数学试卷
(已下线)2014届内蒙古鄂尔多斯市高三下学期模拟考试理科数学试卷2014-2015学年河南省郑州47中高二上学期第一次月考试理科数学卷北京海淀北京19中2016-2017学年高一下学期期中考试数学试题
12-13高一·四川成都·阶段练习
4 . 在数列
中,
,前
项和
,则数列
的通项公式为 ( )
![](https://img.xkw.com/dksih/QBM/2013/4/24/1571196349652992/1571196355076096/STEM/1f53179ae5bb4341b8ef0a2c0a09d13b.png?resizew=29)
![](https://img.xkw.com/dksih/QBM/2013/4/24/1571196349652992/1571196355076096/STEM/8ee2e9a0781045b98b74902531c7d80b.png?resizew=45)
![](https://img.xkw.com/dksih/QBM/2013/4/24/1571196349652992/1571196355076096/STEM/5a5b89b7c7d4499d9c72f0e7dd759985.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2013/4/24/1571196349652992/1571196355076096/STEM/572dc1ae88ef4faa94a5b4e8a1e3214e.png?resizew=109)
![](https://img.xkw.com/dksih/QBM/2013/4/24/1571196349652992/1571196355076096/STEM/1f53179ae5bb4341b8ef0a2c0a09d13b.png?resizew=29)
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12-13高三上·重庆·期末
5 . 数列
定义如下:
,则
=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab7c0dcafae37bf0098e8c49d084573e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf9e5f3adfedd607e4cd0e43a6846e3.png)
A.91 | B.110 | C.111 | D.133 |
您最近一年使用:0次