名校
解题方法
1 . 等差数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331e95093927765b3b4ef77a9c0591a9.png)
,则
的最大值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0acf4c64d3919d2cc0bd0a9953133714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331e95093927765b3b4ef77a9c0591a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6afb7577911fa01ca4ad899a97eb7fab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
名校
解题方法
2 . 已知数列
是首项为25,公差为
的等差数列,则数列
的前30项的和为________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74eb8a7738402df52d4a97262b85ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231aa49898ba213a9df4d337b6a4e88b.png)
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2024-01-05更新
|
1654次组卷
|
5卷引用:辽宁省沈阳市五校联考2024届高三上学期期末数学试题
解题方法
3 . 在等差数列
中,
,
,
为数列
的前n项和,
,则
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3a98359ffae37dc6b8fe45fdcc5ae5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5268e7897efdd5bda34a963098349c4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91adba8efbf964e9e35547b0fd0ea36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4311e8079e3564738b37c53d56eea12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
名校
解题方法
4 . 已知数列
的通项公式为
,记数列
的前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681967bfbdcdae96320e06da896b4da4.png)
__________ ,
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ed4b8cc130d1eab232d399d4066f5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91adba8efbf964e9e35547b0fd0ea36.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/681967bfbdcdae96320e06da896b4da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99d200aac7c303cc885b22406e18ac90.png)
您最近一年使用:0次
2022-03-16更新
|
357次组卷
|
3卷引用:河北省沧州市任丘第一中学2021-2022学年高二上学期期末数学试题
河北省沧州市任丘第一中学2021-2022学年高二上学期期末数学试题河北省沧州市2021-2022学年高二上学期期末数学试题(已下线)高二上学期期末【压轴60题考点专练】(选修一+选修二)-2022-2023学年高二数学考试满分全攻略(人教A版2019选修第一册)
名校
5 . 设数列
的前n项和为
,若
,且
是等差数列.则
的值为__________ .
![](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/ab8c8e74213dd6be2dd4d34c1aae3817.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f9455bb1be0546692d9b0cfdcc9017.png)
您最近一年使用:0次
2022-02-03更新
|
1855次组卷
|
6卷引用:安徽省六安市第一中学2021-2022学年高二上学期期末数学试题
安徽省六安市第一中学2021-2022学年高二上学期期末数学试题(已下线)4.2等差数列C卷单元综合测试-数列(已下线)第四章 数列章末检测卷(一)-【帮课堂】2022-2023学年高二数学同步精品讲义(人教A版2019选择性必修第二册)福建省漳州市东山县2023-2024学年高二上学期期中数学试题(已下线)4.2.2 等差数列的前n项和公式——课后作业(巩固版)
名校
6 . 已知
是数列
的前
项和,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
________ ;若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f6d2f9704c53877827f4bb0e3bb6844.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/1e62306440ab4be5305cd550ddae6130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b46156f515c26c96997054b141ed35b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f6d2f9704c53877827f4bb0e3bb6844.png)
您最近一年使用:0次
2021-11-23更新
|
596次组卷
|
3卷引用:天津市河东区2021-2022学年高二上学期期末数学试题
7 . 给出下列命题:①等比数列1,
,
,
,…(
)的前
项和为
;②等差数列
中,若
,
,则该数列的前13项或14项之和最大;③若等差数列
公差为
,则其前
项和
;④若等比数列
单调递增的充要条件是首项
,且公比
;⑤若数列
满足
,
,则
.其中正确的是______ (把你认为正确的命题序号都填上).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8cc0b4997cae4d8aec791a1d3923314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b367f647833446cf684c3ddedb1592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef311c39ffa93698337da80bb551d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c339234052548a53ce660908f38a1210.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/112896d1e2bca1811d0e4584db40906c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2efd3ae9ca4a2f807b476f09bc7d135b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda6dc559d07bc22c9a0ed1e3a6d01d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5dca4e85b2473ebe529b897e7c4086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97034664bd213a31e81b9625f83d0e26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c700b3d474933d7a0c68275e03844474.png)
您最近一年使用:0次
8 . 已知数列
的通项公式
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb23c6a9e8a42faef0a84be8ad6b008.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f448cebfaf66b70a4c8485bde0398d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb23c6a9e8a42faef0a84be8ad6b008.png)
您最近一年使用:0次
2019-07-09更新
|
810次组卷
|
2卷引用:四川省攀枝花市2018-2019学年高一下学期期末数学试题
名校
9 . 设数列
的通项为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/567a7faf486cb3fea99b8318e3da2736.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04272dd286dea18949c3d55f9436d559.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/567a7faf486cb3fea99b8318e3da2736.png)
您最近一年使用:0次
2016-12-04更新
|
726次组卷
|
5卷引用:2015-2016学年河北冀州中学高一下期末理科数学试卷