名校
解题方法
1 . 已知等差数列
的前
项和为
,且
,
.数列
中,
,
.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdef06cffd632946bee883e34dfa9c7.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/3fde84802e22ec09383eeb5fa2218e9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9888a27d07f3a08109723fa25b60c3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385275d29d8c8a7841eaeaa3dfab2cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf47ea98fc093e7e2b5fd37a89350182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdef06cffd632946bee883e34dfa9c7.png)
您最近一年使用:0次
2 . 已知等差数列
的公差为d,等比数列
的公比为q,若
,且
,
,
,
成等差数列.
(1)求数列
,
的通项公式;
(2)记
,数列
的前n项和为
,数列
的前n项和为
,求
,
.
![](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/d49ea9d8789ddd76e598a437111cf13a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/000f01319364c59dee948848fc4de4c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba57c83d526ac308d1461e80fcca9f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2023-08-01更新
|
276次组卷
|
7卷引用:四川省绵阳实验高级中学2021-2022学年高三上学期10月月考数学(理科)试题
四川省绵阳实验高级中学2021-2022学年高三上学期10月月考数学(理科)试题重庆市第七中学2022届高三上学期高考仿真预测模拟数学试题江西省新余市2019-2020学年高二上学期期末数学(理)试题河北省衡水中学2023届高三上学期第三次综合素养评价数学试题黑龙江省牡丹江市第一高级中学2022-2023学年高三上学期期末数学试题云南省元谋县第一中学2022-2023学年高二下学期数学期末模拟(六)试题(已下线)高二上学期期末数学模拟试卷(人教A版2019选择性必修第一册+数列)-【题型分类归纳】2023-2024学年高二数学同步讲与练(人教A版2019)
名校
解题方法
3 . 已知数列
的前
项和为
, 且
, __________.请在
成等比数列;
, 这三个条件中任选一个补充在上面题干中, 并解答下面问题.
(1)求数列
的通项公式;
(2)设数列
的前
项和
, 求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751c3b0c7d916ddc24d7bd036ea0eecd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4011c597ba394120a1a74b6f4a401159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25108967f8f95c445c109348592d4fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff3432f48e3f2e684d45e89403110ea9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9694346716bad8031f17fff37273ddc.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751c3b0c7d916ddc24d7bd036ea0eecd.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55f3cadcc65d380f74102037b46a4f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59887a5ab83d604d78b8a204b7f88bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24974f2d84f24c6dc2d836e0d9fa5359.png)
您最近一年使用:0次
2022-12-26更新
|
849次组卷
|
7卷引用:四川省南充市2021-2022学年高三高考适应性考试(一诊)数学(理)试题
四川省南充市2021-2022学年高三高考适应性考试(一诊)数学(理)试题四川省遂宁市第二中学校2023届高三上学期一诊模拟考试理科数学试卷(二)(已下线)热点07 数列与不等式-2022年高考数学【热点·重点·难点】专练(新高考专用)湖南省岳阳市2022届高三下学期教学质量监测(三)数学试题(已下线)数列求和广东省揭阳市普宁国贤学校2022-2023学年高二上学期期末数学试题山西省晋城市泽州县晋城一中教育集团南岭爱物学校2022-2023学年高二上学期1月期末调研考试数学试题
名校
解题方法
4 . 记
为等差数列
的前
项和,且
,则
取最大值时
的值为( )
![](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/a207c6d8c8e50d034b3653c767f5da7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.12 | B.12或11 | C.11或10 | D.10 |
您最近一年使用:0次
2022-12-02更新
|
1386次组卷
|
13卷引用:四川省广安市武胜烈面中学校2021-2022学年高二上学期数学(理)入学考试试题
四川省广安市武胜烈面中学校2021-2022学年高二上学期数学(理)入学考试试题四川省广安市武胜烈面中学校2021-2022学年高二上学期数学(文)入学考试试题陕西省咸阳市武功县普集高级中学2022-2023学年高二上学期第一次月考数学试题甘肃省天水市第一中学2022-2023学年高二上学期期中数学试题(已下线)4.2 等差数列(3)(已下线)第四章 数列(A卷·知识通关练) (4)(已下线)第五章 数列(A卷·知识通关练)(5)(已下线)第3讲 等差数列的前 项和及性质10大题型(4)(已下线)专题5 等差数列的单调性和前n项和的最值问题 微点2 等差数列前n项和的最值的求法1.2.3 等差数列的前n项和(同步练习提高版)天津市滨海新区塘沽第二中学2023届高三上学期11月期中数学试题(已下线)4.2 等差数列(练习)-高二数学同步精品课堂(苏教版2019选择性必修第一册)天津市宝坻区第四中学2023-2024学年高三上学期期中综合测试二数学试题
名校
解题方法
5 . 对下列命题:
(1)
的最小值为4;
(2)若
是各项均为正数的等比数列,则
是等差数列;
(3)已知
的三个内角
所对的边分别为
,
,
,且最大边长为
,若
,则
一定是锐角三角形;
其中所有正确命题的序号为_________ (填出所有正确命题的序号).
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24539bf655f0693621fdf36098346de2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc71a2fd8c6b263feea5ff5d6a36121.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95563a79e3b68c597ae1e5167516ff88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
其中所有正确命题的序号为
您最近一年使用:0次
6 . 已知数列
各项都是正数,
,对任意
都有
.数列
满足
,
.
(1)求数列
,
的通项公式;
(2)数列
满足
,数列
的前
项和为
,若不等式
对一切
恒成立,求
的取值范围.
![](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/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f11fe9c37b3e0457d6a8cbc7da0e12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7fc42ff08c230c7924635a426af797b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94b8d581526f7110c972e791f073d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1c614c2cff112cba29d9bbef30b6e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2022-08-14更新
|
667次组卷
|
3卷引用:四川省广安市武胜烈面中学校2021-2022学年高二上学期数学(文)入学考试试题
解题方法
7 . 等差数列
中,
则数列
的前2021项和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ace36c0309d6557d2c05c2780b1ab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2935b2be1fcc2d8760211cb31e99d239.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
8 . 已知数列
满足
.
(1)求证:数列
是等差数列,并求数列
的通项公式;
(2)若
,数列
的前
项和为
,则关于正整数
的不等式
(其中
)最多有几个解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2279dad9128614e32e1b3446fbf336b7.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a44cfbb86a4eb76261c00ddc6bff181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0857559ed421cc7c614708f34f9f3324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ebc391558f07f7f484df93950fc6cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b8e5990ef4ef314941a3154457a9d4.png)
您最近一年使用:0次
9 . 记等差数列
的前n项和为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ffbfb2502cc0ef8c5e1e60c567df35.png)
____________ .
![](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/78b77d9511ecee6a9b8bf0f38d101b28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ffbfb2502cc0ef8c5e1e60c567df35.png)
您最近一年使用:0次
2022-04-12更新
|
623次组卷
|
8卷引用:四川省绵阳市2021届高三三模数学(理)试题
四川省绵阳市2021届高三三模数学(理)试题四川省绵阳市2021届高三第三次诊断文科数学试题(已下线)押新高考第14题 数列-备战2021年高考数学临考题号押题(新高考专用)(已下线)押第14题 数列小题-备战2021年高考数学(理)临考题号押题(全国卷2)河南省顶尖名校2021-2022学年高三下学期第三次素养调研文科数学试卷(已下线)2022年全国高考乙卷数学(文)试题变式题5-8题(已下线)4.1 等差数列(精练)-【一隅三反】2023年高考数学一轮复习(基础版)(新高考地区专用)(已下线)2022年全国高考乙卷数学(文)试题变式题13-16题
名校
10 . 以过圆
内一点
的最短弦长为等差数列
的首项
,最长弦长为其末项
,若等差数列
的公差
,则项数n的取值不可能是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ae422236b39ccadf0260492cb14473.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/601b6e8e0de5e22fb87f5ecac715c5e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4373a8c3b06155bfb87ae9bf4e1276.png)
A.4 | B.5 | C.6 | D.7 |
您最近一年使用:0次