名校
1 . 设等差数列
的前n项和为
,若
,则当
取得最小值时,n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/255742bea7cc5507c73a57d77d40c303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
A.11 | B.10 | C.9 | D.8 |
您最近一年使用:0次
2024-04-06更新
|
557次组卷
|
4卷引用:1号卷·A10联盟2021-2022学年(2020级)高二下学期期末联考数学试卷(北师大版)
1号卷·A10联盟2021-2022学年(2020级)高二下学期期末联考数学试卷(北师大版)(已下线)第一章数列章末十六种常考题型归类(2)甘肃省民乐县第一中学2023-2024学年高三下学期5月第一次模拟考试数学试卷(已下线)专题06 等差数列与等比数列(2)--高二期末考点大串讲(人教B版2019选择性必修第二册)
解题方法
2 . 在前
项和为
的等差数列
中,
,
,则
( )
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a2b096d82bd60565d8d9478cec5523.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d648520b133ad41c505d5713cb656cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebce85ea9bc18815ef8887057030a63.png)
A.5 | B.15 | C.45 | D.90 |
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2024-03-07更新
|
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2卷引用:【名校面对面】2022-2023学年高三大联考(11月)文数试题
3 . 已知
,
,
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4292234d8a1c922266e2e53f8048c95b.png)
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e181cf680167b7aa6808d7b9e803f85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d499cf8b05914b0a434396d4846929a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d84f9bfb2c9de5beef25d4edf529f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4292234d8a1c922266e2e53f8048c95b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89ba85f74cda4ddd621278e558bc036f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
您最近一年使用:0次
4 . 若数列
的前
项和
,则数列
的前
项和
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab8159d658290b9df2453eef6f275b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be67f7ce9d528348fa1cf90208d305c3.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/04c2864e2ec3416cc4c081ac1f71a0af.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-02-27更新
|
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2卷引用:中原名校2022年高三上学期第四次精英联赛文科数学试题
解题方法
5 . 在数列
中,
,且数列
是等差数列,则数列
的前8项和
为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fccc6e52a2ba333642bf4991ca45905d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db6d5d9622d93870b874bbd8ea76c845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eed39c7d611309b01476c15ab242308.png)
您最近一年使用:0次
解题方法
6 . 利用系统抽样的方法,从全班编号为1,2,3,…,65,66的学生中,选6名学生参加夏令营的活动,已知选到编号为4的学生参加,则选中的6名学生的编号的和为________ .
您最近一年使用:0次
解题方法
7 . 设等差数列
的前
项和为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb261bb45b5137a7236ccddcfdface6f.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d12c5c63e3a1ed7494f3aede87cb4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb261bb45b5137a7236ccddcfdface6f.png)
您最近一年使用:0次
解题方法
8 . 在等差数列
中,
,则数列
的前8项和等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fccc6e52a2ba333642bf4991ca45905d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.16 | B.24 | C.32 | D.64 |
您最近一年使用:0次
名校
解题方法
9 . 设等差数列前n项和为
,若
,
,则
等于( )
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
10 . 在前
项和为
的等差数列
中,
,
,则
( )
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb0ea3ca5891318d12aacd55c8e59cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c12588db47476f2cf7e18b929ed9e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
A.3 | B.10 | C.15 | D.25 |
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2024-02-10更新
|
1187次组卷
|
5卷引用:【名校面对面】2022-2023学年高三大联考(11月)理数试题