在数列
中,
,则
=
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572443819499520/1572443825094656/STEM/1910de0f210e4639aac302ad421c2c0c.png)
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572443819499520/1572443825094656/STEM/e2d4978501ff485981a5f1ede5b4abf2.png)
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572443819499520/1572443825094656/STEM/af4e3630942a4e6aa5ce00066a2c67e7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
9-10高一下·辽宁·期末 查看更多[6]
(已下线)2010年辽宁省长春市十一高中高一下学期期末学生素质考试数学试题(文)(已下线)2010年长春市十一高中高一下学期期末考试数学卷(已下线)2013-2014学年辽宁实验中学分校高二上学期阶段性测试理科数学试卷2016届宁夏银川一中高三上学期第四次月考理科数学试卷2015-2016学年天津市耀华中学高一下期中数学试卷(已下线)2.1数列的概念与简单表示法(2) -2020-2021学年高二数学课时同步练(人教A版必修5)
更新时间:2016-12-04 00:48:03
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【知识点】 累加法求数列通项
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单选题
|
适中
(0.65)
名校
解题方法
【推荐1】等比数列
满足
,
,数列
满足
,
时,
,则数列
的通项公式为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ef35b21da4cd8130642539d8245f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cf962f8801d1a4845df3720f685e3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0aa9c841db107532e7804bf7a0e0151.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6707875e57e30eb159801e6bb30c4931.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】假设如图所示的三角形数表的第
行的第二个数为
,则
( )
![](https://img.xkw.com/dksih/QBM/2020/3/16/2420882236481536/2422258376065024/STEM/9ad5ac8aa5e847cf9855a9a1b3d1208c.png?resizew=246)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b428f15acf8dd69d2e9a9a0559202230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9933eb88fdfe7e5d89ea2880820bd9.png)
![](https://img.xkw.com/dksih/QBM/2020/3/16/2420882236481536/2422258376065024/STEM/9ad5ac8aa5e847cf9855a9a1b3d1208c.png?resizew=246)
A.2046 | B.2416 | C.2347 | D.2486 |
您最近一年使用:0次