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1 . 《张丘建算经》是我国古代的一部数学著作,现传本有92问,比较突出的成就有最大公约数与最小公倍数的计算、各种等差数列问题的解决、某些不定方程问题求解等.书中记载如下问题:“今有女子善织,日增等尺,初日织五尺,三十日共织390尺,问日增几何?”那么此女子每日织布增长( )
A.![]() | B.![]() | C.![]() | D.![]() |
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8卷引用:黑龙江省鸡西市密山市第四中学2023-2024学年高二上学期8月月考数学试题
黑龙江省鸡西市密山市第四中学2023-2024学年高二上学期8月月考数学试题江苏省南通学科基地2021届高三高考数学全真模拟试题(六)(已下线)专题08 数列-2021年高考真题和模拟题数学(文)分项汇编(全国通用)(已下线)6.1 等差数列(精讲)-【一隅三反】2022年高考数学一轮复习(新高考地区专用)(已下线)专题07 数列-备战2022年高考数学母题题源解密(新高考版)福建省福安市第一中学2022-2023学年高二上学期第一次月考数学试题重庆市北碚区2022-2023学年高二上学期10月月考数学试题(已下线)4.2.2等差数列的前n项和公式(第1课时)(分层作业)-【上好课】高二数学同步备课系列(人教A版2019选择性必修第二册)
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解题方法
2 . 在等差数列
中,已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98785291554a7421c242aff961533ed.png)
(1)求数列
的通项公式;
(2)设数列
的前
项和为
,求满足
的
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98785291554a7421c242aff961533ed.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设数列
![](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/ade47598510917b18557339027024b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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3卷引用:黑龙江省鸡西实验中学2023-2024学年高二上学期期末模拟数学试题
黑龙江省鸡西实验中学2023-2024学年高二上学期期末模拟数学试题湖南省跨地区普通高等学校对口招生2021届高三下学期5月三轮联考数学试题(已下线)专题7.3 等差数列的前n项和-2022届高三数学一轮复习精讲精练
3 . 设
是等比数列,公比大于0,
是等差数列,
.已知
,
,
,
.
(Ⅰ)求
和
的通项公式;
(Ⅱ)设数列
满足
,
,其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b08c58baacec3cd0c0a06e267fa9ec5.png)
(i)求数列
的通项公式;
(ii)若
的前n项和
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fc82353331abee0828dee9b38c08f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9990d2b1f1099520a70eb90bc2446510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78051a32ad7947e021dc91faee48549d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b9101909b4c87f73e3e8b3bcd5aca9.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(Ⅱ)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd08da087d2a650ea2b51d92e656a67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d7a9dfd15bd51c3260902ab9644174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b08c58baacec3cd0c0a06e267fa9ec5.png)
(i)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6989caaa907fc3da74b6bfd25d9737e.png)
(ii)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1604218a2ef97bf7405f85040315fd76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863f50efdb1d7fc683ea83a33c6ab9f1.png)
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2021-01-20更新
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7卷引用:黑龙江省鸡西实验中学2023-2024学年高二上学期期末模拟数学试题
黑龙江省鸡西实验中学2023-2024学年高二上学期期末模拟数学试题天津市滨海七校2020-2021学年高三上学期期末联考数学试题(已下线)专题07 数列(练)-2021年高考数学二轮复习讲练测(新高考版)(已下线)专题07 数列(练)-2021年高考数学二轮复习讲练测(文理通用)浙江省2021届高三4月份高考数学模拟试题(9)(已下线)专题6.数列与数学归纳法 -《2022届复习必备-2021届浙江省高考冲刺数学试卷分项解析》天津市耀华中学2022届高三下学期统练9数学试题
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4 . 在等差数列
中,
,那么
等于______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f84a16c77e7866c63b84d2fe52276354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1855cd14a8a8c1d47b53522c1047888.png)
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2020-12-09更新
|
1302次组卷
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5卷引用:黑龙江省虎林市实验高级中学2021-2022学年高二上学期期末数学试题
黑龙江省虎林市实验高级中学2021-2022学年高二上学期期末数学试题四川省都江堰中学2019-2020学年高一下学期期中数学试题(已下线)4.2.1 等差数列的概念(2)A基础练(已下线)专题4.6 《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二册同步单元AB卷(新教材人教A版,浙江专用)黑龙江省七台河市勃利县高级中学2021-2022学年高二上学期期末考试数学试题
5 . 在①
,②
,③
这三个条件中任选一个,补充在下面问题中,并解答问题:已知正项等差数列
的公差是等差数列
的公差的两倍,设
、
分别为数列
、
的前n项和,且
,
,________,设
,求
的前n项和
.注:如果选择多个条件分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5032706dd285c22e149c675da465d9ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5527f23f70f390fc81b925338594be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c62b575607722d4b98e721f13b79a4e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8890769a19ffa101e95d672c4a343d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b4e688ad5156121531f6e0f4b4c1eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d98410f0f650449c5bdc0d84149103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
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2020-11-30更新
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346次组卷
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4卷引用:黑龙江省鸡西实验中学2023-2024学年高二上学期期末模拟数学试题
名校
6 . 已知等差数列
的前
项和为
.若
,公差
,则
的最大值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd015442628054692b8cc0a19c77d2bf.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/366dfedff1a1a96ec27650375b680059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc807ea4b8a7ed325aee49aa292552ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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2020-11-15更新
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7卷引用:黑龙江省鸡西市实验中学2024届高三上学期第三次月考数学试题
名校
解题方法
7 . 已知
是各项均为正数的等比数列,
为
,
的等差中项.
(1)求
的公比;
(2)若
,设
,求数列
的前
项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4e2d08cb0cbd07edb93dc2f9c7ed390.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee90c6611c96d493ce52637a4ed4ae3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c5f35601a1dcd6e81cfdf74e31527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2020-11-08更新
|
614次组卷
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4卷引用:黑龙江省鸡东县第二中学2021-2022学年高三上学期期中考试数学(理)试题
名校
8 . 已知数列
,
,
均为等差数列,且
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d620cf7ecd74dae0362e96ebfa11d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ff929f27db5c61994ef083b95148f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4bdbade81a0b4cd2778b8778b351ba6.png)
A.4037 | B.4039 | C.4041 | D.4043 |
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2020-11-08更新
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5卷引用:黑龙江省鸡东县第二中学2021-2022学年高三上学期期中考试数学(理)试题
9 . 等差数列{an}的前n项和为Sn,若S17=51,则2a10﹣a11=( )
A.2 | B.3 | C.4 | D.6 |
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2020-10-18更新
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512次组卷
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6卷引用:黑龙江省鸡东县第二中学2021-2022学年高三上学期期中考试数学(理)试题
名校
解题方法
10 . 已知数列
为等差数列,
,
.
(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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0ee2535b088761a42c4bf363a64db5.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d289d8e284958dbe5e78494e37f3149.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2020-09-26更新
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3卷引用:黑龙江省鸡西实验中学2023-2024学年高二上学期期末模拟数学试题