名校
解题方法
1 . 已知数列
的前n项和为
,将该数列按下列格式(第n行有
个数)排成一个数阵,则该数阵第8行从左向右第8个数字为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce817f902302ebdd5a599e43df77614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f1ad18371ec533aeac27cf1fad95c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a229eaf71f4377f4851634c2e20f989.png)
您最近一年使用:0次
名校
2 . 已知数列
满足:
,
,设数列
的前
项和为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cceb2c03455b66b7014b3df7282c01db.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e472ad6e7bf7a6a409a43d4ea9035e0.png)
A.1007 | B.1008 | C.1009.5 | D.1010 |
您最近一年使用:0次
2020-03-20更新
|
675次组卷
|
5卷引用:湖南省常德市石门县第二中学2019-2020学年高二上学期第一次月考数学试题
3 . 已知数列
中,
,且对任意的
,都有
成立,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bde7e16266e3fcba81e2d1227a52a6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7419eab350c5266ebd58156ea7e43a.png)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 将等差数列1,4,7,…按一定的规则排成了如图所示的三角形数阵,根据这个排列规则,数阵中第10行最后一个数是_____ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/ab2987da-7f32-46c2-8fac-337934940eb3.png?resizew=152)
您最近一年使用:0次
2020-03-16更新
|
604次组卷
|
3卷引用:湖南省湘西州2018-2019学年高二上学期期末数学(理)试题
5 . 已知等差数列
的前n项和为
,且
,
.数列
的首项为3,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33da2a751a63f8946c11234ed55dab2b.png)
________ .
![](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/d5ef35b21da4cd8130642539d8245f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af9d6941ab0cc5d87c8f20a19385034.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ea92902980c21bc18f5c68f316f559.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33da2a751a63f8946c11234ed55dab2b.png)
您最近一年使用:0次
6 . 意大利数学家列昂那多·斐波那契以兔子繁殖为例,引入“兔子数列”:1,1,2,3,5,8,13,21,34,…,即
,此数列在物理、化学等领域都有广泛的应用,若此数列被2整除后的余数构成一个新数列
,则数列
的前2020项的和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d722391e00000b81fea7a148467a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.1347 | B.1348 | C.1349 | D.1346 |
您最近一年使用:0次
2020-03-15更新
|
441次组卷
|
2卷引用:2020届海南省全国大联考高三第三次联考数学试题
7 . 已知数列
中,
,
且对
,总有
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2693734765399876e9e93cdb110231c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3172a2dfbce3ce32fd909ff548e75b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7419eab350c5266ebd58156ea7e43a.png)
A.1 | B.3 | C.2 | D.![]() |
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8 . 已知一组数1,1,2,3,5,8,
,21,34,55,按这组数的规律,则
应为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.11 | B.12 | C.13 | D.14 |
您最近一年使用:0次
2020-03-06更新
|
303次组卷
|
2卷引用:吉林省辽源市田家炳高级中学(六十七届友好学校)2018-2019学年高一下学期期末联考数学(理)试题
名校
解题方法
9 . 我们可以利用数列
的递推公式
,求出这个数列各项的值,使得这个数列中的每一项都是奇数研究发现该数列中的奇数都会重复出现,那么第4个5是该数列的第________ 项.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96763deba06b219ac08afeb890ecb3e2.png)
您最近一年使用:0次
2020-03-05更新
|
264次组卷
|
3卷引用:黑龙江省大庆市实验中学2018-2019学年高一下学期第一次月考数学试题
名校
解题方法
10 . 已知数列
的前
项和为
,令
,记数列
的前
项为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7f784a27defb8f2e3a17aa883e0bc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6945619c4a6a65b642d3d3f62e8ae44c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12874a5fab429bb2ffdfa69566c1d20a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-03-04更新
|
1636次组卷
|
4卷引用:四川省遂宁市2018-2019学年高一下学期期末数学试题
四川省遂宁市2018-2019学年高一下学期期末数学试题河北省衡水市衡水中学2022届高三上学期第二次调研数学试题河北省衡水中学2022届高三上学期二调数学试题(已下线)专题9 周期数列 微点1 周期数列的定义、性质和判定方法