名校
1 . 已知数列
是首项为
,公比为
的等比数列,设
,数列
满足
.
(1)求证:数列
是等差数列;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2438f2272d7b7ab51dbbe587025a553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6821eb83c0e78f23cbf124d364ced75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39cb8a1ebe340a64f3ba0c03de09bed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a180095a5f57005c29adbacb244714b.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(2)求数列
![](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
2019-01-17更新
|
674次组卷
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6卷引用:辽宁省阜新市第二高级中学2022-2023学年高二下学期期中数学试题
名校
2 . 已知数列
满足
.
(1)证明:数列
是等比数列;
(2)令
,数列
的前
项和为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e8707339f9c895a07935755bddae4c.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098d9e65e9676e4386c5d861c8eb03b5.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a561cc9303ea5d2748eae54cab9de7.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2019-01-09更新
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7卷引用:辽宁省朝阳市建平县实验中学2022-2023学年高二下学期4月月考数学试题
3 . 已知数列
的前n项和为
,且满足
.
(1)证明:数列
为等比数列,并求数列
的通项公式;
(2)数列
满足
,
其前n项和为
,试写出
表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f5ebe027befb1590459eb59226b939a.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca27c5ab59cf43553727f214fb4ca79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefb48ec9a7f27c858c283262d939958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca8064ab7010740f4566977d746f2221.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca8064ab7010740f4566977d746f2221.png)
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4 . 设等差数列
的公差为
,点
在函数
的图象上(
).
(1)证明:数列
是等比数列;
(2)若
,函数
的图象在点
处的切线在
轴上的截距为
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aebadfbe0d52ea3bbdf6c7497460cb0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee6881a170f6ef9ed5c133b95c2f448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761fa1ce83111907341ea674ccf7b762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0275263e670c5ede144c4b97421097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64b1265e3d4bc5c98fe99a9161a1b51.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
2019-01-30更新
|
2173次组卷
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6卷引用:辽宁省鞍山市2024届高三上学期期末联考模拟练习数学试题
辽宁省鞍山市2024届高三上学期期末联考模拟练习数学试题2014年全国普通高等学校招生统一考试文科数学(四川卷)2016届吉林省吉林大学附中高三上第四次摸底文科数学试卷(已下线)2019高考热点题型和提分秘籍 【文数】专题10 导数的概念及运算 (教学案)(已下线)专题6 等比数列的判断(证明)方法 微点2 通项公式法、前n项和公式法(已下线)专题21 数列解答题(文科)-3
名校
5 . 已知数列{an}满足
,且
.
(1)求证:数列
是等差数列,并求出数列
的通项公式;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9889ce795a4379be591baaf53499bd9.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25cbe66fe4e84b4022721122baab4a3.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)
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2018-10-13更新
|
2242次组卷
|
5卷引用:辽宁省沈阳市五校协作体2019-2020学年高三上学期期中数学(理) 试题
名校
6 . 已知数列
的前
项和为
,且满足
.
(1)求数列
的通项公式;
(2)令
,记数列
的前
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/944cb4ab12bd0f9c45fc69d662b7fa9a.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f6000421c5370e4b89f23be199f388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfccc89f83f2af31049391057c8f525d.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/f1cb91e89800a81f4d62ed75c3ace24a.png)
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2018-10-04更新
|
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3卷引用:辽宁省辽河油田第二高级中学2017-2018学年高二下学期期末考试数学(理)试题
解题方法
7 . 数列
的前
项和记为
,已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26b7e8d8e8c44604a681b0ccdab5d3a.png)
(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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26b7e8d8e8c44604a681b0ccdab5d3a.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
(2)求数列
![](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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
8 . 已知正项数列
的前
项和为
是
与
的等比中项.
(1)求证:数列
是等差数列;
(2)若
,数列
的前
项和为
,求
.
![](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/da05821a261a217c82db4fdfefb1dc4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26da68db818bb8bd7edb4ac53bc77bc4.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d3d55a85012933f91c5d8d27d8801d.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2017-11-07更新
|
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7卷引用:辽宁省沈阳市东北育才学校科学高中部2021-2022学年高三上学期第三次模拟考试数学试题
名校
9 . 已知数列
,
,
为数列
的前
项和,
,
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe021309c7ea1e58d0b165f2c5eec94c.png)
.
(1)求数列
的通项公式;
(2)证明
为等差数列.
(3)若数列
的通项公式为
,令
.
为
的前
项的和,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e78f07af568e395269122824300b039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8370a173854471a3eb27637993a3d5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe021309c7ea1e58d0b165f2c5eec94c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31eb761dbf1a5a1106dad1a25ce08a89.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092910e683ac87df1b7c643ca80e5c31.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/771e7687d79e249a0b7b768220c61cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8c06db928acb22ff897b0710424d39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59d789051798795d5575d4c3896750e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2018-03-18更新
|
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8卷引用:辽宁省实验中学、大连八中、大连二十四中、鞍山一中、东北育才学校2017-2018学年高二上学期期末考试数学(文)试题
辽宁省实验中学、大连八中、大连二十四中、鞍山一中、东北育才学校2017-2018学年高二上学期期末考试数学(文)试题天津市滨海新区2017届高三上学期八校联考(理科)数学试卷广东省中山市第一中学2017-2018学年高二上学期第二次统测数学(理)试题广东省中山市第一中学2017-2018学年高二上学期第二次统测数学(文)试题福建省闽侯第四中学2017-2018学年高二上学期期末考试数学(文)试题陕西省黄陵中学2017-2018学年高二(普通班)下学期开学考试数学(文)试题江西省宜春市上高县第二中学2019-2020学年高一下学期期末考试数学(文科)试题重庆市缙云教育联盟2020-2021学年高二上学期10月月考数学试题
10 . 已知数列
的前n项和为
,且满足
(n∈N+)
(1)求证
是等比数列,并求
;
(2)
,求数列
的前n项和为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3903653955c424d3f6135edc5b47e231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267dc50d81b658217fb4e33e3bc1adad.png)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2de706dc5f0439b989273a5367f63a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95eda8514716b7e844cf40e0efd5351a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2018-01-01更新
|
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