名校
解题方法
1 . 已知等比数列
的前n项和为
,且
,其中
.
(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,在数列
中是否存在不同三项
,
,
(其中
成等差数列)成等比数列?若存在,求出这样的三项;若不存在,请说明理由.
![](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/b9f1c9bdfb252a71b1fc88d7f8082240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.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/82e260b088f071983f254ce8f5163fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8598379ec01edc16c72c1d3fa3ce81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8904e7018ec79c8b0efdcb3ba67cb7cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2554efe1860dc6c769c34d8cfa6de3e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7955013519718c9ac993531062495e95.png)
您最近一年使用:0次
解题方法
2 . 已知等差数列
的公差为
,数列
与数列
满足
且
.
(1)求数列
与
的通项公式;
(2)求数列
的前
项和
与数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.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/7d4886610370087259028de8f061c66c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04e041e235335092ff4047a25eeb98a8.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求数列
![](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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
名校
解题方法
3 . 已知数列
为等差数列,其首项为1,公差为2,数列
为等比数列,其首项为1,公比为2,设
,
为数列
的前
项和,则当
时,
的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/000f01319364c59dee948848fc4de4c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1242bce7122127c9c1ba38eab216215f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.9 | B.10 | C.11 | D.12 |
您最近一年使用:0次
2024·全国·模拟预测
解题方法
4 . 已知在等比数列
中,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24432e1ab38bce40c82ff9c90138d843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86aa1c078fcf0ca6eb56e109d01ac7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f340fa7f359ea9331eaa6449e05d665.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
5 . 若
是等比数列,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a0eecb5b800fce9ae10aed86ffee62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
A.7 | B.9 | C.25 | D.35 |
您最近一年使用:0次
2024-04-08更新
|
1192次组卷
|
3卷引用:第一章数列章末综合检测卷(新题型)-【帮课堂】2023-2024学年高二数学同步学与练(北师大版2019选择性必修第二册)
(已下线)第一章数列章末综合检测卷(新题型)-【帮课堂】2023-2024学年高二数学同步学与练(北师大版2019选择性必修第二册)云南省昆明市2024届”三诊一模“高三复习教学质量检测数学试题北京市北京师范大学燕化附属中学2023-2024学年高二下学期期中考试数学试卷
6 . 设正项数列
的前
项和为
,
,且满足_____.给出下列三个条件:
①
,
; ②
;
③
.
请从其中任选一个将题目补充完整,并求解以下问题.
(1)求数列
的通项公式;
(2)若
,求数列
的前
项和
.
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df1038200f2d97a52c716aab6c3bcb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ceb2af10086d16399167b8f0181e17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e68f3125818585998b2a82f348cfd06.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03c5da0a9c1708082a5716453236f77e.png)
请从其中任选一个将题目补充完整,并求解以下问题.
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d256cbf15595993837844a34cc56c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2024-03-31更新
|
453次组卷
|
5卷引用:单元测试B卷——第四章 数列
单元测试B卷——第四章 数列四川省南充高级中学2023-2024学年高二下学期第一次月考(3月)数学试题四川省成都市西北中学2023-2024学年高二下学期4月阶段性考试数学试题(已下线)模块四专题6重组综合练(四川)(8+3+3+5模式)(北师大版高二)福建省福州外国语学校2023-2024学年高二下学期4月期中考试数学试题
2024高二下·全国·专题练习
解题方法
7 . 高斯是德国著名数学家,近代数学的奠基者之一,享有“数学王子”的称号,用他名字定义的函数称为高斯函数
,其中
表示不超过
的最大整数,如
,
,已知数列
满足
,
,
,若
,
为数列
的前
项和,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc74f388d1672074d66ca67581388f6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d54a0e82778f606d95a486835ac9f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f2323cbdf0b1b71092c962ae705102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1928c254cfada1f75a5cd1e34db5a63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d845281cd834068104af1b1aa6027c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c73c39be7e317460e2fe1d4e05195bcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4bc88dbf8fc854838ea57a24924d080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c3ac959bdf1b78cb98d92b87c91c46.png)
A.2023 | B.2024 | C.2025 | D.2026 |
您最近一年使用:0次
名校
8 . 已知等比数列
共有
项,
,所有奇数项的和为85,所有偶数项的和为42,则公比q=__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2def5aa62f497709e1bd8258583d62fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
您最近一年使用:0次
2024-03-10更新
|
1619次组卷
|
4卷引用:第一章数列章末综合检测卷(新题型)-【帮课堂】2023-2024学年高二数学同步学与练(北师大版2019选择性必修第二册)
(已下线)第一章数列章末综合检测卷(新题型)-【帮课堂】2023-2024学年高二数学同步学与练(北师大版2019选择性必修第二册)山东省淄博市2024届高三下学期一模考试数学试题四川省成都市成都外国语学校2023-2024学年高二下学期3月月考数学试题四川省成都市简阳实验学校2023-2024学年高二下学期3月月考数学试题
9 . 设数列
满足
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9225d5767620fc35d0e44e9d5ac872c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0acca5aa6b2285d897a65c289c1b54ba.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-02-28更新
|
1044次组卷
|
5卷引用:单元测试B卷——第四章 数列
单元测试B卷——第四章 数列河北省石家庄二中2023-2024学年高二上学期期末数学试题(已下线)4.3.1 等比数列的概念——课后作业(提升版)(已下线)专题03数列期末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(人教B版2019选择性必修第三册)(已下线)专题07 数列通项公式与数列求和--高二期末考点大串讲(人教B版2019选择性必修第三册)
解题方法
10 . 已知等比数列
的公比为q,前
项和为
,若
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6047828612905592c24d928db5a18e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5124f456eae2e4c94f8021ddcbf9c032.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2024-02-05更新
|
855次组卷
|
3卷引用:第一章数列章末综合检测卷(新题型)-【帮课堂】2023-2024学年高二数学同步学与练(北师大版2019选择性必修第二册)
(已下线)第一章数列章末综合检测卷(新题型)-【帮课堂】2023-2024学年高二数学同步学与练(北师大版2019选择性必修第二册)江苏省东台市2023-2024学年高二上学期期末数学试题江苏省南京河西外国语学校2023-2024学年高二下学期3月调研数学试题