名校
解题方法
1 . 已知等差数列
的公差为2,记数列
的前
项和为
且满足
.
(1)证明:数列
是等比数列;
(2)求数列
的前
项和
.
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7183acf1ce718525286275f75647abe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5608193360ab18b5d6e2331736ecd4b.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3f946894e21775f9d2b4219ed627eb.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec4bdc2a6d4fc387dc621f0b5a268c5.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
2024-04-18更新
|
2268次组卷
|
3卷引用:福建省安溪第八中学2024届高三下学期5月份质量检测数学试题
解题方法
2 . 已知数列满足,
.
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b13b15e5b52587dcc45ae1e5e44f170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
3 . 已知各项均为正数的数列
满足
,且
.
(1)写出
,
,并求
的通项公式;
(2)记
求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75d902955791b9a4271a1329cf56865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48dec60f999bad466520589212c072f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78f788d96ebdf49d5d7c0e1c583fd7f0.png)
您最近一年使用:0次
2024-03-20更新
|
2532次组卷
|
6卷引用:2024届福建省高三下学期数学适应性练习卷
2024届福建省高三下学期数学适应性练习卷(已下线)第18题 数列不等式变化多端,求和灵活证明方法多(优质好题一题多解)(已下线)第18题 等差等比综合考查,生成数列通项求和(优质好题一题多解)(已下线)专题2 奇偶分项 分组并项 练(经典好题母题)重庆市南开中学校2023-2024学年高二下学期3月定时练习数学试题辽宁省沈阳市东北育才学校2023-2024学年高二实验部下学期阶段检测二(6月)数学试题
解题方法
4 . 设等差数列
的公差为
,令
,记
分别为数列
的前
项和.
(1)若
,求数列
的通项公式;
(2)若数列
是公比为正数的等比数列,
,
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b59214a46d47d4e9d45288588f8f737f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d11aca5961a67d5aee3c03821ffad086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/478421b81927e435cbcf5acafa89efd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b813b18bbb5bd16c3d6cb6da3790931.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8850b13e872f581e16d8ebba91575b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/847179a6e6e1a1268ab173586e4c8ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749a622e0249b075373103eb31ff50dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
您最近一年使用:0次
5 . 已知数列
的前
项积为
,且
.
(1)证明:
是等差数列;
(2)从
中依次取出第1项,第2项,第4项……第
项,按原来顺序组成一个新数列
,求数列
的前
项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad36891d5193558a492a3d63713b2719.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
(2)从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe94bca98a93e4518303f78897c591e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ab0309e2cd35585ea9fb2cc3017abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1af68ed265e5653abd5aa5c7109bbf54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2024-02-27更新
|
592次组卷
|
2卷引用:福建省福州第一中学2023-2024学年高三上学期期末考试数学试题
名校
解题方法
6 . 有
个正数,排成
行
列的数表:
,
其中
表示位于第
行,第
列的数.数表中每一行的数成等差数列,每一列的数成等比数列,并且所有公比相等.已知
.
(1)求公比.
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d671caaff548d37ec31ed8f16f21dece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/401154e38414d767b2bdfed4cad5bcd5.png)
其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a14c188b1c9d61aa237b137ba18023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e365b6e559d80d74c82141e3beef149.png)
(1)求公比.
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cedbc05832a699fb919e968a6cc3141.png)
您最近一年使用:0次
解题方法
7 . 已知数列
满足
.
(1)求
的通项公式;
(2)设
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0be2ec2a8ff2f1d5e2d5b6ed4dc38987.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9295ae2257dd744acc4a95c2d5c7536f.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/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2024-01-03更新
|
1979次组卷
|
3卷引用:福建省泉州市实验中学2024届高三上学期1月考试数学试题
名校
解题方法
8 . 已知
为等差数列,
为等比数列,
的前
项和
.
(1)求数列
的通项公式;
(2)记
,求数列
的前
项和
.
![](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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e245cb6c26b79649e7a1784946c1ccf9.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e892f7738660b5a94dd57235b2293b6.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)
您最近一年使用:0次
9 . 已知数列
的前
项和为
,
,
,
.
(1)是否存在实数
,使得数列
为等比数列?若存在,求出
的值;若不存在,说明理由;
(2)记数列
的前
项和为
,当
时,求证:
.
![](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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba984a28be4f5a8ee34d0458aa666ec7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
(1)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81b297ba740ceedbc47507fe99e9613d.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/500d68f2678989a5ce7431cfd51b019d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3fec47d2dd2b8099d86c87b6e57de8.png)
您最近一年使用:0次
2023·全国·模拟预测
名校
解题方法
10 . 已知数列
满足
.
(1)求证:数列
为等比数列,并求
的通项公式;
(2)设
,求
的前
项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec477759508b406985194aca6112fd8.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d363b6982fee3bf1337d1542137a2f3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0b8fa733ee3cc7510ea893a03fe757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2023-11-29更新
|
1099次组卷
|
5卷引用:福建省漳州市诏安县桥东中学(霞葛教学点)2024届高三上学期第二次月考数学试题
福建省漳州市诏安县桥东中学(霞葛教学点)2024届高三上学期第二次月考数学试题(已下线)2024年普通高等学校招生全国统一考试数学领航卷(四)(已下线)2024年普通高等学校招生全国统一考试文科数学领航卷(六)(已下线)题型17 5类数列求和天津市和平区天津市第一中学2023-2024学年高二下学期3月月考数学试题