名校
1 . 已知公差不为0的等差数列
满足
,成等比数列,
为数列
的前
项和,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920ad6b9e7f1c2c4a5a3025ba57e71b1.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/83cb2155335ce8d2196db0ac364706a9.png)
A.-3 | B.-2 | C.2 | D.3 |
您最近一年使用:0次
2019-01-02更新
|
686次组卷
|
21卷引用:2016届云南省玉溪一中高三下第八次月考理科数学试卷
2016届云南省玉溪一中高三下第八次月考理科数学试卷2016届云南省玉溪一中高三下第八次月考文科数学试卷2017届河南郑州一中网校高三入学测试数学(理)试卷2017届河南郑州一中网校高三入学测试数学(文)试卷2017届河北武邑中学高三理上学期调研四数学试卷2017届河北武邑中学高三文上学期调研四数学试卷四川省南充高级中学2017届高三4月检测考试数学(文)试题四川省南充高级中学2017届高三4月检测考试数学(理)试题甘肃省肃南县第一中学2017届高三下学期期中考试数学(文)试题甘肃省肃南县第一中学2017届高三下学期期中考试数学(理)试题河北省武邑中学2017届高三下学期第五次模拟考试数学(文)试题陕西省西安市2018届上学期高三数学(文)期末试题陕西省西安市2018届高三上学期期末考试数学(理)试题【全国百强校】福建省厦门外国语学校2018届高三下学期5月适应性考试(最后压轴模拟)数学(理)试题2017届上海市宜川中学高三第三次模拟(理)数学试题2018届湖南省衡阳市第八中学高三(实验班)第一次模拟数学(文)试题2016-2017学年福建厦门一中高二文上学期期中数学试卷广东省揭阳市惠来县第一中学2017-2018学年高二上学期期中考试数学(文)试题(已下线)2018年12月30日 《每日一题》(理数)人教必修5+选修2-1(高二上期末复习)-每周一测广东省揭阳市惠来县第一中学2018-2019学年高二上学期期中考试数学(文)试题(已下线)2019年12月29日《每日一题》必修5+选修2-1理数-每周一测
名校
2 . 在等差数列
中,已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5905a1755bf66784021797d628751c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ff804e08a81f2e456622972f18f03b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5905a1755bf66784021797d628751c.png)
A.38 | B.39 | C.41 | D.42 |
您最近一年使用:0次
2018-05-01更新
|
2294次组卷
|
7卷引用:2020届云南省陆良县高三毕业班第二次教学质量摸底考试数学(文)试题
名校
3 . 已知{an}为等差数列,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe718a2866ddfac69f8f0e81406f5a12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf79a73c34b2a23d06aa079bf1276955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
A.11 | B.15 | C.29 | D.30 |
您最近一年使用:0次
名校
4 . 等差数列
的前
项和
,
,则
的值为( )
![](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/f2fcd86b9ed6819116a261629f96fae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afbfd6b761451716ba3d7130c93497ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eed39c7d611309b01476c15ab242308.png)
A.40 | B.52 | C.56 | D.64 |
您最近一年使用:0次
2018-02-06更新
|
631次组卷
|
4卷引用:云南省泸水市怒江新城新时代中学2023届高三上学期期末考试数学试题
名校
5 . 等差数列
中,
,前11项的和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a9060f9833fdc330f9c12afe889dc41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df1038200f2d97a52c716aab6c3bcb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a9060f9833fdc330f9c12afe889dc41.png)
A.10 | B.12 | C.14 | D.16 |
您最近一年使用:0次
2017-11-13更新
|
380次组卷
|
2卷引用:云南省玉溪第一中学2018届高三上学期第三次月考数学(文)试题
6 . 在数列
中,
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa635d4ae41a0f7861d305b55bc618f.png)
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329785900390130a04a57d0b55aaa569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f86a8746a583f411fb73c6334eb27b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa635d4ae41a0f7861d305b55bc618f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5e07bf129b073f37b553fbca100172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6fc41c02b201e6096e8904b022db3d8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-10-19更新
|
1079次组卷
|
3卷引用:云南省昆明一中2018届高三第二次月考文科数学试题
云南省昆明一中2018届高三第二次月考文科数学试题【全国百强校】黑龙江省牡丹江市第一高级中学2019届高三上学期期末考试数学(文)试题(已下线)4.2.2等差数列的前n项和公式(第2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)
解题方法
7 . 已知等差数列
的前
项和为
,
,
,则
( )
![](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/36183db0759eec0e108274d229fcd00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51edb7027369b194443909607470afec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb7147e313f9d9f67d19ecb5f499c05.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-10-15更新
|
1061次组卷
|
2卷引用:云南省红河州2017届高三毕业生复习统一检测数学(文)试题
14-15高三上·山东潍坊·期末
名校
8 . 等差数列
的前
项和为
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
![](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/5f6a317d5b107732de68bf2e147eb69d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-04-27更新
|
1589次组卷
|
8卷引用:云南师范大学附属中学2018届高三高考适应性月考卷(一)理数试题
云南师范大学附属中学2018届高三高考适应性月考卷(一)理数试题云南省师范大学附属中学2018届高三高考适应性月考卷(一)文数试题(已下线)2014届山东省潍坊市高三上学期期末考试理科数学试卷(已下线)2014届山东省潍坊市高三上学期期末考试文科数学试卷重庆市江津中学校2018届高三4月月考数学(理)试题广西南宁三中2020届高三数学理科考试二试题安徽省阜阳市太和第一中学2019-2020学年高一下学期期末数学试题广西桂林市第十八中学2020-2021学年高二上学期期中考试数学(理)试题
名校
9 . 已知等差数列
的公差
,且
成等比数列,若
是数列
的前
项和,则
的最小值为
![](https://img.xkw.com/dksih/QBM/2017/5/13/1685976111521792/1687804433350656/STEM/b9c9a73ad4a24337987590be1c045f35.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2017/5/13/1685976111521792/1687804433350656/STEM/0550ab9f538c4046b0df575040621ff7.png?resizew=35)
![](https://img.xkw.com/dksih/QBM/2017/5/13/1685976111521792/1687804433350656/STEM/fb4788ba16f94b909e946ec64ae918fe.png?resizew=56)
![](https://img.xkw.com/dksih/QBM/2017/5/13/1685976111521792/1687804433350656/STEM/0683d54ca9a34f6fa73246d605bb56d8.png?resizew=53)
![](https://img.xkw.com/dksih/QBM/2017/5/13/1685976111521792/1687804433350656/STEM/b9c9a73ad4a24337987590be1c045f35.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2017/5/13/1685976111521792/1687804433350656/STEM/3e0649259b664458a2b381556b31d7af.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2017/5/13/1685976111521792/1687804433350656/STEM/26b361fbfc6543dda6ce88b935b1fa98.png?resizew=96)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
10 . 各项均为正数的等差数列
.其公差
,前
项和为
,若
、
、
构成等比数列,则下列能构成等比数列的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.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/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
A.![]() ![]() ![]() | B.![]() ![]() ![]() | C.![]() ![]() ![]() | D.![]() ![]() ![]() |
您最近一年使用:0次
2016-12-04更新
|
408次组卷
|
2卷引用:2016届云南玉溪市高三第三次教学质检数学(理)试卷