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 |
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2024-04-06更新
|
563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 . 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
|
714次组卷
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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
4 . 已知数列
满足
,数列
是等差数列,则数列
的前20项和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec568900366c12ce299b02ea01a727b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22177a009548e7a16f6f3fe172e59df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a609bf5db47ffa43fd268a0633198dfa.png)
A.420 | B.410 | C.400 | D.380 |
您最近一年使用:0次
解题方法
5 . 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
6 . 已知数列
满足
,设其前
项和为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9802b88a42f53c02b479e8450183867.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/06fbdd2e3efbef1ff014df55b242eced.png)
A.2500 | B.2600 | C.2700 | D.2800 |
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4卷引用:1号卷·A10联盟2022届全国高考第一轮总复习试卷数学(文科)试题(十二)
解题方法
7 . 已知数列
的前
项和
,集合
,则集合
中所有元素之和为( )
![](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/525cc0e90e7f34e6ba5110f448cf0e2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65abbd1622019e83d7a0d1dcaba1684.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
A.1403 | B.1404 | C.1430 | D.1431 |
您最近一年使用:0次
名校
解题方法
8 . 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
9 . 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
|
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|
5卷引用:【名校面对面】2022-2023学年高三大联考(11月)理数试题
名校
解题方法
10 . 在等差数列
中,其前
项和为
,若
是方程
的两个根,那么
的值为( )
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5315a5f5d1c1436d52287f0f8f972f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ed36bf63b3455e5820373b300d2228.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b87df689b605e7a283b56d454c3736a0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-09-07更新
|
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9卷引用:福建省仙游县第二中学2022-2023学年高二上学期期中考试数学试题