名校
解题方法
1 . 设
,用
表示不小于
的最小整数,例如
,
,
,则称
为向上取整函数.已知数列
的各项均为正数,其前
项和为
,且
,
.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96a039c77e505afcbaa01aef995fded0.png)
_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c324a64980f3975e20a15c17a16c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89dce8f79f6a43dd3459c842cf3e410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3420606c96b68fb884c839923fd20a25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1550a97c21c1d71c9e95dde569668be0.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/15613df225de2600950d819544c357ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96a039c77e505afcbaa01aef995fded0.png)
您最近一年使用:0次
名校
解题方法
2 . 已知数列
的前
项和
,则该数列的首项![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
__________ ,通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.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/bbf189665f0945b9d5bc9c2f354c7844.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
您最近一年使用:0次
2022-02-08更新
|
308次组卷
|
2卷引用:重庆市部分区2021-2022学年高二上学期期末联考数学试题
3 . (多空题)若数列{an}是正项数列,且
+
+…+
=n2+3n(n∈N*),则an=________ ,
+
+…+
=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2d92fd0c5d8d67a60e85b5d8825f5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01661eb801e35277c06956c652baa76b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051570bbea0a7289c3776e81cad90c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4917e993146cfd7e1c8d035a3b00a859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd662fcef412bda6b63a76a260485e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f20924bf01d5ff921eb8fb31c7ba8a.png)
您最近一年使用:0次
4 . 下列命题中,真命题的序号是__________ .
①
中,
;
②数列
的前n项和
,则数列
是等差数列;
③锐角三角形的三边长分别为3,4,a,则a的取值范围是
;
④等差数列
前n项和为
,已知
,
,则
;
⑤常数数列既是等差数列又是等比数列;
⑥数列
满足,
,则数列
为等比数列.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c296227429f7018957dd200b8ebc7e28.png)
②数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a5df4d666ed956941509cae1ed53f26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
③锐角三角形的三边长分别为3,4,a,则a的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41f5767cf892d9a5f9215abcc552997.png)
④等差数列
![](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/ceadffe03bce2827706036e54e702da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e070e4c4cd6cafc9cff1739ee1e64c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42dc22436b2a4edf3d6e15e1e5a15343.png)
⑤常数数列既是等差数列又是等比数列;
⑥数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59557c76432f5350a610400e7ab8d27c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
名校
解题方法
5 . 已知数列
的前
项和
,则数列
的通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.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/4300dca231e2f4b37f70900b33439d5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
您最近一年使用:0次
2020-11-21更新
|
799次组卷
|
6卷引用:重庆市綦江实验中学校2017-2018学年高一下学期半期考试数学(理)试题.
名校
解题方法
6 . 已知数列
的各项均为正数,其前n项和为
,且
,n
,则
=_______ ;若
=2,则
=_______ .
![](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/4cbb0f2883ddd23be9435fda33e9c611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bec1b383f61d7a71f10ce999c9321381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a27c112387e56c976489fa484c0d48f.png)
您最近一年使用:0次
2020-09-06更新
|
315次组卷
|
4卷引用:重庆市荣昌中学校2022-2023学年高二下学期第一次月考数学试题
重庆市荣昌中学校2022-2023学年高二下学期第一次月考数学试题江苏省南京市2020-2021学年高三上学期9月期初数学试题(已下线)考点45 章末检测七-备战2022年高考数学一轮复习考点帮(新高考地区专用)【学科网名师堂】江苏省南京市宁海中学2022-2023学年高二上学期期末数学试题
7 . 已知数列
,
为其前
项和,且
.若函数
(
,且
),则它的最小值是______ .
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc8f3e6ffd1d667e4ff506915ad4a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eb3edf7e6494e1e3ad4718b043d6207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
您最近一年使用:0次
名校
解题方法
8 . 设
为数列
的前
项和,若
,
,且
(
),则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fbdd2e3efbef1ff014df55b242eced.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/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bed023d2005c41f02d6246ed0a5b4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21277301fecf3e4f39fccff50a4424a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fbdd2e3efbef1ff014df55b242eced.png)
您最近一年使用:0次
名校
解题方法
9 . 已知数列
的前
项和为
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.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/83053f4167da9916a0fb0ab2cd336a3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
您最近一年使用:0次
2020-02-29更新
|
2629次组卷
|
4卷引用:重庆市育才中学2021-2022学年高二上学期第五次定时练习数学试题
重庆市育才中学2021-2022学年高二上学期第五次定时练习数学试题四川省德阳市什邡中学2018-2019学年高一下学期4月月考数学试题四川省珙县中学校2020-2021学年高一下期数学第5月月考测试题(已下线)专题4.1 数列的概念-2020-2021学年高二数学同步课堂帮帮帮(人教A版2019选择性必修第二册)
名校
解题方法
10 . 已知数列
的前n项和
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ee08efce00f48d475e99d5b1026e18f.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5886e031a95a8d52c9306e6b1c518abc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ee08efce00f48d475e99d5b1026e18f.png)
您最近一年使用:0次