1 . 若在等差数列
中,
,则通项公式![](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/2afd6d09c80c49f7adbeedce8d30e9da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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2 . 设
为等差数列
的前
项和,
,
.
(1)求
的通项公式;
(2)求
的最小值及对应的
值.
![](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/ddb1d153bc13fc0c590a08a105e21ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334ca6bda6ea24a5e63a012201d442c3.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2020-12-08更新
|
810次组卷
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6卷引用:云南省楚雄州中小学2020-2021学年高二上学期期中教学质量监测数学试题
10-11高三·贵州遵义·阶段练习
名校
解题方法
3 . 设递增等差数列
的前n项和为
,已知
,
.
(1)求数列
的通项公式;
(2)求数列
的前n项和
.
![](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/4fa69dde104dcf963e67647e801e0149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e7e8d9aa828672e06aa28e5dd23dd34.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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2021-11-11更新
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530次组卷
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11卷引用:云南省玉龙纳西族自治县田家炳民族中学2019-2020学年高一下学期期中考试数学试题
云南省玉龙纳西族自治县田家炳民族中学2019-2020学年高一下学期期中考试数学试题【校级联考】四川省乐山十校2018-2019学年高一下学期半期联考数学试题湖南省长沙市雅礼教育集团2021-2022学年高二上学期期中联考数学试题(已下线)2012届贵州省湄潭中学高三年级第五次月考文科数学(已下线)2015届山东省桓台县第二中学高三上学期11月检测考试理科数学试卷安徽省六安市舒城县2018-2019学年高一下学期期末考试数学(文)试题(已下线)专题5.5 《第五章 数列》单元测试卷(A卷基础篇)-2020-2021学年高二数学选择性必修第三册同步单元AB卷(新教材人教B版)江西省南城一中2020-2021学年高一4月月考数学(理)试题广东省普宁市大长陇中学2021届高三下学期第一次阶段考试数学试题西藏林芝第二高级中学2021-2022学年高二上学期期末数学(理)试题第7课时 课前 数列的求和
名校
解题方法
4 . 已知公差不为0的等差数列{an}满足
,且a2,a5,a14成等比数列.
(1)求数列{an}的通项公式;
(2)若
,求数列
的前n项和Sn..
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
(1)求数列{an}的通项公式;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea83fc1bcb18a88bd7f59f91a6ad123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5344eadd4711db34e3f935aedd5fb270.png)
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2021-11-23更新
|
525次组卷
|
3卷引用:云南师范大学附属中学2020-2021学年高二下学期期中考试数学(理)试题
名校
5 . 设
为数列
的前
项和,
.
(1)证明:数列
为等差数列,并求
;
(2)设
,求数列
的前
项和
.
![](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/8fd6bd3d346e9c72a8ef32437187b682.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658854c5a3ec56805cb5ed41bd78c78a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348294ad62247c186cd6cff03968d63f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2019-06-19更新
|
1126次组卷
|
4卷引用:云南省曲靖市会泽县茚旺高级中学2018-2019学年高二下学期期中考试数学(文)试题
6 . 已知等差数列
满足:
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca329e77020aaf79d93e11954ad59799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
您最近一年使用:0次
解题方法
7 . 已知数列
是首项为1的等差数列,若
,
,
成等比数列.
(1)求数列
的通项公式;
(2)设
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d93c1ae7b22099a5d4c1c4241e5ca18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0414c0b6fda7fee5eb71976e09da80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216876de04325fd250c38c485cbc34b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
解题方法
8 . 设
为数列
的前
项和,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3a4a8abfad11015f58864f4003653d.png)
(1)证明:数列
为等差数列;
(2)若数列
满足
,求数列
的前
项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3a4a8abfad11015f58864f4003653d.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0336731988224293bc0e9a7958adfd.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f7a7238aa0234e985cb8bf9bb131d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7669dd46703deb275a34e436681acee3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f7a7238aa0234e985cb8bf9bb131d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2010·山东烟台·一模
名校
9 . 已知等差数列
的前n项和为
,且满足
,则数列
的公差是( )
![](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/53518e37e5c3f96303febc06388b684a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.![]() | B.1 | C.2 | D.3 |
您最近一年使用:0次
2019-01-11更新
|
846次组卷
|
12卷引用:2011-2012学年云南省会泽县茚旺高级中学高三上期中文科数学试卷
(已下线)2011-2012学年云南省会泽县茚旺高级中学高三上期中文科数学试卷(已下线)2012届云南省建水一中高三9月月考文科数学北京二中2019届高三上学期期中数学(文科)试题北京市第一六一中学2023-2024学年高二下学期期中考试数学试题(已下线)烟台市中英文学校2010届高三一模考试文科数学试题(已下线)2010年北京市海淀区高三下学期一模数学(文)测试(已下线)2011届广东省汕头市高三第一次模拟考试数学文卷(已下线)2011届广东省汕头市高三第一次模拟考试数学理卷(已下线)2012年山东省高考模拟预测卷(四)文科数学试卷(已下线)2012-2013学年辽宁省丹东市宽甸二中高二上学期期末考试文数试卷2015-2016学年广东东莞东华高中高二4月月考理科数学卷山西省长治市第二中学校2018-2019学年高一下学期第二次月考数学试题
名校
解题方法
10 . 数列
是等差数列且
,
,数列
的前
项和为
,且
.
(1)求数列
,
的通项公式;
(2)求数列
的前n项和为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da6e97248df8f138ebe684c40c950c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.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/99cdaee634bd60340c038f68992c5f51.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52c9237cb0b4acc568d4afb12997186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次