1 . 已知等差数列
的前
项和为
,公差为
,且
单调递增.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/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ba808c24aeae6a2f34b98ae5ec04ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b521653edb53a8480b0b6a3b64f9bb5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-03-22更新
|
1102次组卷
|
2卷引用:浙江省温州市2024届高三第二次适应性考试数学试题
解题方法
2 . 已知等差数列
共有
项,奇数项之和为60,偶数项之和为54,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627a57cd9fdb1f586f35d9825b6bcc0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
您最近一年使用:0次
名校
3 . 已知等比数列
的各项互不相等,且
,
,
成等差数列,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a37f1b45e929b42044626edb63681fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20071a42c1f9eac2b173d77d37381da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911278aa8595846abac1972e1de59995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e190fa9d30fe745b04fdd644d30719c9.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2024-03-21更新
|
1090次组卷
|
4卷引用:河北省邯郸市2024届高三第三次调研考试考试数学试题
河北省邯郸市2024届高三第三次调研考试考试数学试题(已下线)高二下学期期中考试(范围:数列、导数、计数原理)-2023-2024学年高二数学下学期重难点突破及混淆易错规避(人教A版2019)(已下线)第四套 艺体生新高考全真模拟 (三模重组卷)广东省广州市广东实验中学越秀学校2023-2024学年高二下学期期中考试数学试题
4 . 在等差数列
中,若
,则
的通项公式为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/504f08b49ec6020e15f81a811eb32b8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
解题方法
5 . 已知数列
的前n项和为
,
.
(1)求数列
的通项公式;
(2)在
与
之间插入n个数,使这
个数组成一个公差为
的等差数列,求
.
![](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/5a541b9c0fd7a643a1fbe68a7e6f3546.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3468a665ac713ab7b400c672f19650a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c638a6e2cdac947aee806e81142661c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
6 . 已知数列
,记集合
.
(1)若数列
为
,写出集合
;
(2)若
,是否存在
,使得
?若存在,求出一组符合条件的
;若不存在,说明理由;
(3)若
,把集合
中的元素从小到大排列,得到的新数列为
, 若
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/569e56ec73a87d19fa42045d680886c8.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/680e9ef551b325387ab31dca1f893705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9260f8989cfd0ffca5a49ffbc0668f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8f897e289555b25e8a5094c037f4d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45e3bfb472f75e339198fa7415a35b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c639c7e5f1e7e7ee5d5ee2f30b155bb0.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b80c1ed7b10ac7ca1cd81cdd39a8fcc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e37d15cd620c5a9ae9485629354c9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25efaf1a568553b27434c71ddb447c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2024-03-12更新
|
997次组卷
|
3卷引用:2024届北京市延庆区高考一模数学试题
7 . 已知数列
和
满足
,
,
,
.则( )
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ea014220aa658c8baa6e1f43e686a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d24dc5049b3ecd0f4892c63aebe5176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36edb6320f76289e704f94642a48da4.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2024-03-07更新
|
888次组卷
|
3卷引用:江苏省南京市五校2023-2024学年高二下学期期初调研测试数学试题
名校
8 . 在等差数列
中,
,
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fa4cf1aefcb569197b97ecb8fc4049f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d77060931748cee8c21b43d15033b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e76d1d8e50dda4d50229a8a20c57e58.png)
A.13 | B.14 | C.16 | D.17 |
您最近一年使用:0次
2024-03-03更新
|
1216次组卷
|
6卷引用:安徽省合肥市普通高中联盟2023-2024学年高二上学期1月期末联考数学试题
安徽省合肥市普通高中联盟2023-2024学年高二上学期1月期末联考数学试题江西省宜春市第三中学2023-2024学年高二下学期第一次月考数学试卷(B卷)辽宁省大连市第八中学2023-2024学年高二下学期4月月考数学试题四川省广安市友实学校2023-2024学年高二下学期第一次月考数学试题(已下线)专题02等差数列及其前n项和7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)浙江省杭州市浙里特色联盟2023-2024学年高二下学期4月期中联考数学试题
9 . 如图,该形状出现在南宋数学家杨辉所著的《详解九章算法・商功》中,后人称为“三角垛”.“三角垛”最上层有1个球,第二层有3个球,第三层有6个球,……设第
层有
个球,从上往下
层球的总数为
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
A.![]() | B.![]() ![]() |
C.![]() | D.数列![]() ![]() |
您最近一年使用:0次
2024-02-29更新
|
505次组卷
|
2卷引用:河北省强基名校联盟2023-2024学年高二下学期开学联考数学试题
名校
10 . 已知等差数列
满足
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bba04a61ab9dee1219c627921bca0ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd440960b373ac8bdea999d60c0b3b10.png)
A.8 | B.6 | C.4 | D.2 |
您最近一年使用:0次