解题方法
1 . 设等差数列
,前
项和为
,
,则下列结论一定正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/3691b37b7592fcf12eac9eba403cef2a.png)
A.若![]() ![]() | B.若![]() ![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
名校
解题方法
2 . 已知等差数列
的前
项为
,
,
.
(1)求
的通项公式;
(2)若
,求
的值.
![](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/65c42652d6d36a308c8d1a139fd56354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a04747e6fbdfdec7db1909e1b112088d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8dc91265bf660dd88bbd0dab742cbba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2023-06-22更新
|
816次组卷
|
5卷引用:第3课时 课中 等差数列的前n项和
(已下线)第3课时 课中 等差数列的前n项和北京市第六十六中学2021-2022学年高二下学期期中数学试题(线上)江西省全南中学2022-2023学年高二下学期期末教学质量验收数学试题(已下线)考点巩固卷14 等差数列(九大考点)四川省江油市太白中学2023-2024学年高三上学期10月数学理科试题
3 . 等差数列
中,
,公差
为整数,若
,
.
(1)求公差
的值;
(2)求通项
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eee2dd779152b8ad14f4798c0a02e988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958049bb7786337bd8a660b96a5e2b3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff1508953a6b81848a89411596db8c00.png)
(1)求公差
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(2)求通项
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
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解题方法
4 . 已知等差数列
,
,
,
(1)在区间
上,该数列有多少项?
(2)在区间
上,该数列有多少项能被
整除?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce87642d4f11148b5d8e65018431b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c942ba8e169307b51c06db4b56a7e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ed857e43f854552ca346e15164ad7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
(1)在区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7095ffc653ec181c33fa70b869dc760.png)
(2)在区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7095ffc653ec181c33fa70b869dc760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
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5 . 已知数列
为等差数列,其前
项和为
,且
,下列选项错误的是( )
![](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/272bc2339a80720e24f9fd1fca24e3c7.png)
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
您最近一年使用:0次
6 . 设
为等差数列,
为其前
项和,若
,则公差
( )
![](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/38e6388a8838f1d13513f07fba8e0916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
A.2 | B.![]() | C.![]() | D.3 |
您最近一年使用:0次
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解题方法
7 . 已知等差数列
的公差不为0,
且
成等比数列,则错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b1b845916a4b6a18cdfbcd308d09c4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-11-19更新
|
481次组卷
|
5卷引用:4.3 等比数列(4)
(已下线)4.3 等比数列(4)黑龙江省佳木斯市第十二中学(佳木斯市建三江第一中学)2022-2023学年高三上学期期中数学试题(已下线)2023届高三押题卷二(测试范围:高考全部内容)河南省郑州市宇华实验学校2024届高三上学期期中数学试题(已下线)专题08 数列(5大易错点分析+解题模板+举一反三+易错题通关)
名校
解题方法
8 . 设数列
是等差数列,
是数列
的前n项和,
,
,则
等于( )
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d324048b18a4bf7b71c2e74e94629f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ec42a1fb4d702c725f469141866bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27182444d3da4003680f07ec299087c.png)
A.10 | B.15 | C.20 | D.25 |
您最近一年使用:0次
2022-11-16更新
|
713次组卷
|
5卷引用:4.2 等差数列(5)
名校
9 . 若
为等差数列,
是数列
的前
项和,
,
,则
等于( )
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d324048b18a4bf7b71c2e74e94629f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ec42a1fb4d702c725f469141866bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b133cf8b10be3b80d31796b5765311f.png)
A.7 | B.6 | C.5 | D.4 |
您最近一年使用:0次
2022-11-16更新
|
628次组卷
|
7卷引用:4.2 等差数列(2)
(已下线)4.2 等差数列(2)(已下线)专题06 等差数列及其前n项和8种常见考法归类(1)四川省遂宁市2023届高三零诊考试数学(文科)试题四川省遂宁市射洪中学校2022-2023学年高三上学期零诊数学试题(文)(已下线)海南省华东师范大学第二附属中学乐东黄流中学2022-2023学年高二上学期12月教学质量监测(期末)数学试题河南省焦作市博爱县第一中学2022-2023学年高二下学期3月月考数学试题山西省运城市景胜学校2024届高三上学期11月月考数学试题B卷
解题方法
10 . 已知等差数列
的公差
,前
项和为
.
(1)若1,
,
成等比数列,求
;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5c1344592c925b273f2cb9b9e47ebbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)若1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11485054ad3058fb599d9c3fb0820508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
您最近一年使用:0次
2022-11-16更新
|
211次组卷
|
3卷引用:4.3 等比数列(4)