名校
解题方法
1 . 数列
的前
项和为
,且
,数列
满足
,
.
(1)求数列
的通项公式;
(2)求证:数列
是等比数列;
(3)设数列
满足
,其前
项和为
,证明:
.
![](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/22261e0f98252e0ab47b78378025e874.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/760183e852fc753187257bbda7a5f1f9.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3f946894e21775f9d2b4219ed627eb.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8b3c6bf8122b705ecfeb93b543bf93e.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/c02e80983b88cdf6b540502816c87d13.png)
您最近一年使用:0次
2020-10-31更新
|
5899次组卷
|
10卷引用:广东省广州市荔湾区2019-2020学年高二上学期期末数学试题
广东省广州市荔湾区2019-2020学年高二上学期期末数学试题广东省广州市八区2019-2020学年高二上学期期末教学质量监测数学试题广东省广州市白云区2019-2020学年高二上学期期末教学质量检测数学试题广东省广州市海珠区2019-2020学年高二上学期期末联考数学试题(已下线)考点12+等比数列-2020-2021学年【补习教材·寒假作业】高二数学(人教B版2019)黑龙江农垦建三江管理局第一高级中学2020-2021学年高三上学期12月月考数学(理)试题江西省贵溪市实验中学2020-2021学年高一3月第一次月考数学试题(已下线)专题4.3 等比数列-2020-2021学年高二数学同步培优专练(人教A版2019选择性必修第二册)(已下线)考点23 已知递推公式求同通项公式求数列的通项公式-备战2022年高考数学(文)一轮复习考点帮天津市和平区2022-2023学年高二上学期期末数学试题
23-24高二上·全国·课后作业
2 . 设
,
,
,
是等比数列
的项,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f84aac9ff61204b05af0202c322ca3e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681ae1522a36768618f7ddaf74abbb7e.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/998eef899e26a71a49f5d91cc130d5e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a63a5d360f9b7fd5f709680810b34ed6.png)
您最近一年使用:0次
2023高三·全国·专题练习
解题方法
3 . 若数列
的前
项的和为
.求证:数列
为等比数列.
![](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/43f745a4894ba1f9a215911d50ac1283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
23-24高二上·全国·课后作业
4 . 已知
,
是项数相同的数列.
(1)若数列
是公差为d的等差数列,数列
满足
,证明数列
是等比数列;
(2)若数列
是公比为q的正项等比数列,数列
满足
,证明数列
是等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(1)若数列
![](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/a601ea5db825ae0d1dc6a4b3cad06b03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若数列
![](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/4f4a57cc10613c6b261ac3a8649cbdaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
名校
解题方法
5 . 在数列
中,
,
,
.
(1)设
,求证: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/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b59fac0a027bc7005e8e4ed946017f0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655c46b33730f3a29b9ec3024df71375.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e760fd67663947e5bd1800efdae057.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)
您最近一年使用:0次
2022-12-26更新
|
3490次组卷
|
5卷引用:黑龙江省实验中学2022-2023学年高二上学期期中数学试题
名校
解题方法
6 . 已知数列
是公比为2的等比数列,
,
,
成等差数列.
(1)求数列
的通项公式;
(2)若
,设数列
的前n项和
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](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/ebfa14def8b0176f9f0bcb6d9ceeaa4b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba37e3bf20792d2acb4487f2469cfe7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36815c5c63a7b8b79974595f4149e292.png)
您最近一年使用:0次
2022-12-18更新
|
2030次组卷
|
3卷引用:辽宁省大连市滨城联盟2022-2023学年高三上学期期中(‖)考试数学试题
22-23高二·全国·课后作业
解题方法
7 . 已知数列
的前n项和
,证明
是等比数列,并求出通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8e34cdd334b668fe8ca80e133833b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
您最近一年使用:0次
2023高三·全国·专题练习
解题方法
8 . 数列
满足:
,
.记
,求证:数列
为等比数列;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f4e1236d7dc0366d9523d0cbb426be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad6da7ad1551677d31dc6eb4d5dc4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e760fd67663947e5bd1800efdae057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
2022-06-30更新
|
953次组卷
|
5卷引用:4.2 等比数列(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)4.2 等比数列(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)4.3.1 等比数列的概念(精练)-【题型分类归纳】2022-2023学年高二数学同步讲与练(人教A版2019选择性必修第二册)(已下线)4.3.1等比数列的概念与性质(3)(已下线)5.3.1等比数列(分层练习,7大题型)-2023-2024学年高二数学同步精品课堂(人教B版2019选择性必修第三册)(已下线)1.3.1等比数列的概念(分层练习)-2023-2024学年高二数学同步精品课堂(北师大版2019选择性必修第二册)
名校
解题方法
9 . 已知数列
的前
项和为
,且
为正整数.
(1)证明:
是等比数列;
(2)当
取到最小值时,求
的值.(参考数据:
)
![](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/3c6fcdfe4018ec0594f9c5e20fbc796e.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c895d4ce5ce82ef9b311b9369b4de11.png)
(2)当
![](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/11ac36fbba8c672eea0afbe88d51ab98.png)
您最近一年使用:0次