1 . 已知数列
满足
,
,
.
(1)求证:数列
是等比数列;
(2)求数列___________的前
项和
.
从条件①
,②
,③
中任选一个,补充到上面的问题中,并给出解答.
注:如果选择多个条件分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7723a4aae09788bca23cbc9f5b0ec6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c286f0bf939f0ec7abed0d75f414c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128d43fbfe37d2334f8666239efc7e32.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求数列___________的前
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
从条件①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252c11358caee9b67dcf43ef17c01f77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303d10573dc9ca05c9282fe0d6ffee2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ad9df86906d55173c669003b1216f1.png)
注:如果选择多个条件分别解答,按第一个解答计分.
您最近一年使用:0次
2021-05-23更新
|
561次组卷
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5卷引用:辽宁省凤城市第一中学2021-2022学年高三上学期10月月考数学试题
辽宁省凤城市第一中学2021-2022学年高三上学期10月月考数学试题(已下线)普通高等学校招生全国统一考试 数学押题卷(六)新高考2021届高三考前保温热身模拟卷数学试题(四)河北省秦皇岛市青龙满族自治县第一中学2021届高三适应性考试数学试题(已下线)考前题型猜猜猜(终极预测)-2021年高考数学解答题挑战满分专项训练(新高考地区专用)
2 . 已知等比数列
的各项均为正数,
,
,
成等差数列,且满足
,数列
的前
项之积为
,且
.
(1)求数列
和
的通项公式;
(2)设
,求数列
的前
项和
.
(3)设
,若数列
的前
项和
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8afb5276cccd088ed7cada99858bff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4774fd0e7fbe540dd8f52c67ac6a0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f136cae0bc90e8f766e2829d26158d57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.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/2fb6c88e8e9c3a70b941f2d2de803651.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25b67af73f586837594ab0db4b89baed.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)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19792ed1f95d2389f9a1146b413b89b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b8836efad09a8e5a0d158e88472fae3.png)
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2021-10-22更新
|
2374次组卷
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4卷引用:辽宁省实验中学北校区2021-2022学年高三上学期第一次月考数学试题
辽宁省实验中学北校区2021-2022学年高三上学期第一次月考数学试题(已下线)2021年全国高考乙卷数学(文)试题变式题16-19题河北省曲阳县第一高级中学2021-2022学年高二上学期12月月考数学试题(已下线)2020年新高考全国1数学高考真题变式题17-22题
3 . 在数列
中,
,
..
(1)求
的通项公式;
(2)在下列两个问题中任选一个作答,如果两个都作答,则按第一个解答计分.
①设
,数列
的前n项和为
,证明:
.
②设
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c0bca11497dfa25d7ea0cd4647a2d2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)在下列两个问题中任选一个作答,如果两个都作答,则按第一个解答计分.
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e4fd0783713648310475c3d49bbc73c.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/55760a5738a7c29820e6844d9cae2d38.png)
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f8489e9e0448aaca428b1ebb9eb2f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2021-05-09更新
|
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9卷引用:辽宁省朝阳市2021届高三高考数学三模试题
辽宁省朝阳市2021届高三高考数学三模试题福建省莆田市2021届高三三模数学试卷湖南省部分学校2021届高三下学期联考数学试题山东省2021届高三5月联考数学试题广东省肇庆市百花中学2021届高三下学期5月模拟数学试题山东省泰安市与济南市章丘区2021届高三5月联合模拟考试数学试题山东省2021届高三5月份高考数学联考试题(已下线)一轮复习大题专练33—数列(结构不良型问题)-2022届高三数学一轮复习(已下线)第2讲 数列通项与求和(讲·)-2022年高考数学二轮复习讲练测(新教材地区专用)
4 . 已知数列
的前
项和为
,且
.
(1)求证:数列
为等比数列;
(2)设
,求数列
的
项和
.
![](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/fb6f3a1d9d8020fd79a518fa942d76cb.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2de706dc5f0439b989273a5367f63a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed92203d2ba0415f1b824e6298700bb.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
2020-10-16更新
|
289次组卷
|
4卷引用:辽宁省大连市普兰店市第三十八中学2020-2021学年高三上学期开学考试数学试题
5 . 已知等比数列
的前
项和为
,
,
.
(1)求数列
的通项公式;
(2)证明:数列
为等差数列;
(3)设
,求数列
的前
项和
.
![](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/28d84ee688592caf22e84910db79e7d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e25bdccc4302e8aa103b09d2b98f756.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e987756fedea2408cd8c8a0672c3f50.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480250cfde0385da3017723aa3767fa5.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
2021-01-02更新
|
207次组卷
|
2卷引用:辽宁省名校联盟2020-2021学年高三上学期12月份联合考试数学试题
解题方法
6 . 已知数列
中,
,
.
(1)设
,证明数列
是等差数列,并求数列
的通项公式;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c324a0db02261f9dd45bdd2a2d6be9.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d3d55a85012933f91c5d8d27d8801d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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
名校
解题方法
7 . 已知数列{an}的前n项和为Sn,且满足2Sn=3an-3,其中n∈N*.
(1)证明:数列{an}为等比数列;
(2)设bn=2n-1,cn=
,求数列{cn}的前n项和Tn.
(1)证明:数列{an}为等比数列;
(2)设bn=2n-1,cn=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae86a14fff543362b6214beb7565ef3.png)
您最近一年使用:0次
2020-11-22更新
|
447次组卷
|
4卷引用:辽宁省鞍山普通高中2023-2024学年高一下学期6月月考数学试题(A)
8 . 在数列
中,
,
.
(1)设
,证明:
是等比数列,并求
的通项公式;
(2)设
为数列
的前n项和,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c092d9b038d848cb2afd0e368037f1cf.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8078fcf1cbd3a2b96457605ba0ef566b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f465a44170e765ed018eeca0d3054dc.png)
您最近一年使用:0次
2020-10-29更新
|
1106次组卷
|
6卷引用:辽宁省丹东市2020届高三下学期总复习质量测试(二)数学(理)试题
9 . 若数列
的前n项和
满足
,
.
(1)求证:数列
是等比数列;
(2)求数列
的前n项和
;
(3)设
,求数列
的前n项和
.
![](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/88d60948fb65e86c170ede4c1cd9fc4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04d440a98360d3dfee4a07fd7a8acbe.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c895d4ce5ce82ef9b311b9369b4de11.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c5c2d777efa6bd6e832b5755f8e436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac07953530e3c248b3438fb200fb1661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd6a506c0a4d15847ac3fc88437908a.png)
您最近一年使用:0次
10 . 某企业为一个高科技项目注入了启动资金1000万元,已知每年可获利
,但由于竞争激烈,每年年底需从利润中抽取200万元资金进行科研、技术改造与广告投入,方能保持原有的利润增长率.设经过
年之后,该项目的资金为
万元.
(1)设
,证明数列
为等比数列,并求出至少要经过多少年,该项目的资金才可以达到或超过翻两番(即为原来的4倍)的目标(取
);
(2)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e2fa2c62d988b9c016b77a1f4be70e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50ee4bac8bd5424a924e5b72e40dbfd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ac9e5e7b99b75b61851a6ec1459166.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e38242434ddc582d813876acd4b71b.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/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次