名校
解题方法
1 . 已知等差数列
的前
项和为
,若
,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/f18bb265fde0ead55c8eef46aa2ee66a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eab8f8926b996f9bee57d96067f5bac.png)
A.36 | B.48 | C.96 | D.24 |
您最近一年使用:0次
名校
解题方法
2 . 已知等差数列
,前
项和为
是方程
两根,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/ac2b54b21cadb153b5fd9cd226e92d69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8034dddd265a186e29172623e3b9eadf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cd370c770843d3b51882cc6c45cb361.png)
A.2020 | B.2022 | C.2023 | D.2024 |
您最近一年使用:0次
2024-05-28更新
|
394次组卷
|
2卷引用:浙江省“七彩阳光”新高考研究联盟2023-2024学年高二下学期期中联考数学试题
解题方法
3 . 等差数列
满足
,公差为2,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a889e13ba8518fa34494ed1295078999.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90750030105f99f7d133ada48b2e911f.png)
A.96 | B.90 | C.84 | D.78 |
您最近一年使用:0次
名校
4 . 已知正项等差数列
的前
项和为
,则
的最大值为( )
![](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/95e83045e1e309928889f15849fdf566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef758f5a10f3c6b08208c907f943ae5c.png)
A.4 | B.8 | C.16 | D.32 |
您最近一年使用:0次
名校
解题方法
5 . 已知
为等差数列,
为其前
项和.若
,公差
,
,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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b108abcbf7090b2ed3ba6408ce8b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6858b87af2a83a7698a276772f6e7bfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.4 | B.![]() | C.6 | D.5 |
您最近一年使用:0次
6 . 已知
,
分别是等差数列
与
的前
项和,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ded9218c1c14e687b8b02857ad6633fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d73dab898bafa3adea84f50001b3d8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-04-13更新
|
541次组卷
|
2卷引用:浙江省舟山市舟山中学2023-2024学年高二下学期4月清明返校测试数学试题
名校
解题方法
7 . 已知两个等差数列
与
的前
项和分别为
和
,且
,则使得
为整数的正整数
的个数是( )
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4c099c3a5113521c0711427b1617ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462f644c4a74b81d24687e3fc613ec54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.3 | B.4 | C.5 | D.6 |
您最近一年使用:0次
2024-03-29更新
|
376次组卷
|
2卷引用:浙江省精诚联盟2023-2024学年高二下学期3月联考数学试题
解题方法
8 . 已知等差数列
中,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b055e8944f42eed905af6be22eaff996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eab8f8926b996f9bee57d96067f5bac.png)
A.24 | B.36 | C.48 | D.54 |
您最近一年使用:0次
9 . 卫生纸是人们生活中的必需品,随处可见.卫生纸形状各异,有单张四方型的,也有卷成滚筒形状的.某款卷筒卫生纸绕在圆柱形空心纸筒上,纸筒直径为40mm,卫生纸厚度为0.1mm.若未使用时直径为90mm,使用一段时间后直径为60mm,则这个卷筒卫生纸大约已经使用了( )
A.25.7m | B.30.6m | C.35.3m | D.40.4m |
您最近一年使用:0次
2024-02-14更新
|
703次组卷
|
3卷引用:浙江省嘉兴市2024届高三上学期期末检测数学试题
名校
10 . 记
为等差数列
的前
项和,若
,则
( )
![](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/de64f3be3e15fd76d052f8c3c121e1be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d36243198e5e20c56399e4ad5ac3c519.png)
A.20 | B.16 | C.14 | D.12 |
您最近一年使用:0次
2024-02-06更新
|
2879次组卷
|
5卷引用:浙江省舟山市2023-2024学年高二上学期期末检测数学试题
浙江省舟山市2023-2024学年高二上学期期末检测数学试题广东省2024届高三数学新改革适应性训练一(九省联考题型)山东省淄博市2024届高三下学期一模考试数学试题湖南省长沙市雅礼中学2024届高三下学期3月综合测试(一)数学试题(已下线)专题04数列求和的6种常考题型归类【好题汇编】-备战2023-2024学年高二数学下学期期末真题分类汇编(北师大版2019选择性必修第二册)