名校
解题方法
1 . 等差数列
的前n项和
满足
,数列
,
,
,…,
的前5项和为9.
(1)求数列
的通项公式;
(2)若数列
的前n项和为
,
,求证
.
![](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/751859e4f0b1cb2c94fd5cca373de9af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe164d8a8a4049e01565b576007651de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01416ee1d48b17f889e444b7eda99740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439fc2a492c940b8dbd366407d6cfa06.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](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/a1cfd82db92ce3d23c88877ab6f837f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447d06989f94a12a22b982c85443cfdd.png)
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2022-10-27更新
|
852次组卷
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6卷引用:数列专题:数列求和的6种常用方法-【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)数列专题:数列求和的6种常用方法-【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)2017届山西省高三下学期名校联考数学(文)试卷(已下线)山西省2017届高三下学期名校联考数学(文)试题内蒙古集宁一中(西校区)集宁一中2020-2021学年高三上学期期中考试数学(文)试题内蒙古乌兰察布市集宁一中西校区2020-2021学年高三(上)期中数学(文科)试题山东省青岛市青岛第九中学2020-2021学年高三上学期期中数学试题
名校
解题方法
2 . 已知数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cfcf2148eb3d4544ff0c9e7e2b679b.png)
(1)证明:数列
为等差数列:
(2)设数列
满足
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cfcf2148eb3d4544ff0c9e7e2b679b.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf3da897eb73b729f66bb0d700775c5.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b676976524797205f5e4c99bee51a1c.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)
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2022-12-17更新
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1562次组卷
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8卷引用:山东省实验中学2022-2023学年高三上学期12月月考数学试题
山东省实验中学2022-2023学年高三上学期12月月考数学试题(已下线)数列求和(已下线)广东省深圳市高级中学(集团)2023届高三上学期期末数学试题变式题17-22(已下线)2023年高三数学押题密卷二内蒙古自治区赤峰市林东第一中学2023届高三下学期3月模拟考试理科数学试题(已下线)拓展二:数列求和方法归纳(4)四川省绵阳南山中学2023届高三下学期入学考试数学(文)试题(已下线)专题09 数列求和6种常见考法归类(2)
名校
解题方法
3 . 已知
为数列
的前
项积,且
,
为数列
的前
项和,满足
(
,
).
(1)求证:数列
是等差数列;
(2)求
的通项公式;
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.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/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de777c4e44546bcfe26ad5b6bb418052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1315f9d6cf17d960fee4e786fa559d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8050391385b496e9c059201e4f12600a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d1e2a85ebb0e10662c8852f1441fbc0.png)
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4 . 已知数列
中,
,
.
(1)求证:
是等比数列,并求
的通项公式;
(2)设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/325b1de4aa0a5a8eb6ec7af2d352138e.png)
求数列
的前
项的和
.
![](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/72bd31afce062c6ae2ed0bda1ca8066c.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d952560a646941e247b251071ec26e86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/325b1de4aa0a5a8eb6ec7af2d352138e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2db9a58e185e4fd9c4f86efb24480f1.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)
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名校
解题方法
5 . 已知首项为1的等差数列
的前
项和为
,若
成等比数列.
(1)求
和
:
(2)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/37c0609f48ac7e62a55034ddd1be679d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd3cd6cb0c8e4b6da70c2bd7b9cec9c.png)
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2022-05-09更新
|
1100次组卷
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3卷引用:贵州省贵阳市2022届高三适应性考试(二)数学(文)试题
6 . 已知数列
满足
.
(1)令
,求证:数列
为等差数列,并求
;
(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/31c318658cf816ec0430bea594bbb756.png)
(1)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4188680e5320653753ad0340439cb77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f4b39eb163aac24c99e624c84b16eeb.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
7 . 已知
为正项数列
的前n项的乘积,且
.
(1)求
的通项公式;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e56030e953ae151cc4301442709e14b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe527aa2c672e51758ea18bd7bc1f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d4a5e4dc53e04b98be97c2e835cac46.png)
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8 . 已知数列
的前
项和为
,且
, .请在①
;②
成等比数列;③
,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)若
,记数列
的前
项和为
,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/448d0f33a081274c3b63a118cbe31e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7afafc032b325d1d667ccedc5d1fd27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2df98ce180b9d9e1a83f2c1332e2da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4fdd7c09570afa545088fef4a369057.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4dc1e086d4aea10107c65f825b72de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af0d8d4f6e5b80bcb510173c5802358.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/9c3fec47d2dd2b8099d86c87b6e57de8.png)
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9 . 已知正项数列
的前
项和
,且
.
(1)证明:数列
为等差数列;
(2)记
,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/28b755962609b57513653b99570f7580.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df2bc2ff05920beca4d7534cc20a390c.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032b74193c04dd5b9b389f93de59e2cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7deae2046fbf30e86692dd4d18af6ad.png)
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2022-12-08更新
|
1554次组卷
|
3卷引用:山东省临沂市2022-2023学年高三上学期期中数学试题
10 . 记
为数列
的前
项和
已知
.
(1)求
,并证明
是等差数列![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
(2)从下面
个条件中选
个作为本小题的条件,证明:
.①
②
.
![](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/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa093f7c2bbc8b2ecb4887995bd989a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d58ed86115082ef4eca8105a42c5a331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
(2)从下面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/815f0297fb0d1e69ac16f50b07925ef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc574b8d8ea0b9ed58bcbc983311f25c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c1c7132f572eeca069e3e220285abb.png)
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