1 . 已知数列3,33,333,3333,…则通项![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
您最近一年使用:0次
2020-02-14更新
|
298次组卷
|
3卷引用:重庆市江津第六中学2018-2019学年高一下学期期中数学试题
2 . 等差数列
中
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715aaa320d35fd92b2dcd9573ab8b489.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc077de5c52b0a44b6297de1d0b78a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715aaa320d35fd92b2dcd9573ab8b489.png)
您最近一年使用:0次
解题方法
3 . 数列
中,已知
,且
,则
等于______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6065aaa8f3f103d1bc960da8318ce35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3741a2bb31c3b41fb76d7171b395fdef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e35eeaabd951fb09b2926807da3685b.png)
您最近一年使用:0次
4 . 已知数列
的前
项为
,若
,且
,则
的取值范围是__________ .
![](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/066484dde11717191bd428838bc998f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1480de6e0664564159d1e6d5f89b498d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
您最近一年使用:0次
2020-02-10更新
|
265次组卷
|
2卷引用:重庆市2020届高三(上)期中数学(文科)试题
名校
5 . 大衍数列,来源于我国的《乾坤谱》,是世界数学史上最古老的数列,主要用于解释中国传统文化中的太极衍生原理.其前11项依次是:0,2,4,8,12,18,24,32,40,50,60,则大衍数列的第41项为________ .
您最近一年使用:0次
6 . 已知数列
的前n项和
,则
的值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d9a3310a28b9f17fa0aa69a14957fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
您最近一年使用:0次
名校
7 . 已知数列
满足
,且
.记数列
的前
项和为
,若对一切的
,都有
恒成立,则实数
能取到的最大整数是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d379316dbb3a43e30f166865e0b2b9e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.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/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411a62ce67f3136311d6c8cb7f19fb5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2019-12-16更新
|
285次组卷
|
2卷引用:重庆市合川实验中学2021届高三上学期期中数学(理)试题
8 . 等差数列
的前n项和记为
,已知
,
,若存在正数k,使得对任意
,都有
恒成立,则k的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81cbb5b0cd0f4507ddf0f38e2b13a7c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5ea799bbc22c1e2abeb5a369753e54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1340718507150998c9ac8fc3c119d649.png)
您最近一年使用:0次
名校
9 . 在等比数列{an}中,已知a2a4a6=8,则a3a5=______
您最近一年使用:0次
2019-12-01更新
|
425次组卷
|
8卷引用:重庆市重庆外国语学校2018-2019学年高一下学期期中数学试题
名校
10 . 已知
.若数列
是递增数列,则实数a的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38136b6a2a1db277897d153e7b6ce725.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2019-10-10更新
|
910次组卷
|
3卷引用:重庆市第一中学2019-2020学年高三上学期期中考试数学(文)试题