解题方法
1 . 已知数列
满足
,且
,数列
满足
,且
(
表示不超过
的最达整数),
.
(1)求
;
(2)令
,记数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b27d183fca6217c8be7c334613e8ee8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14835bf3f00139ccec0694d0924db795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae42543d271e27c181a8ba4f458ec1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cdf67ee471259fd7055f422cf7f2deb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f161c2a3717f1b6c62d0d7dae0b606.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a36f980e033927c9ca246316e88674.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca84e405a2ff721664ec3459ff724996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ab0309e2cd35585ea9fb2cc3017abf.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/82ac1a7bbdd844ca98ea5d667d3a91b0.png)
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解题方法
2 . 把满足任意
总有
的函数称为和弦型函数.
(1)已知
为和弦型函数且
,求
的值;
(2)在(1)的条件下,定义数列:
,求
的值;
(3)若
为和弦型函数且对任意非零实数
,总有
.设有理数
满足
,判断
与
的大小关系,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4e857897b5a9f64308cf5906b9fa13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc2d1d213b8c962e739d7a70d329e36.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79517322d3a40f2bd83c1f4857eb5d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/732de73b498406d00195863a58dd3a24.png)
(2)在(1)的条件下,定义数列:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8754b211788bae54574c7015e84d3ad1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad22914993941de58212102ebd2eeae.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89379f1012f030cb02e37ba27315842f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e17d40cc0988f2a71b96819cdeee72c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d65ffdad008a79f32dc1f7511a82a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a12c44a3c63a15882674e37dcdc31399.png)
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解题方法
3 . 设数列
的前n项之积为
,满足
(
).
(1)设
,求数列
的通项公式
;
(2)设数列
的前n项之和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f63d08ec4fbc6fa83221658bd55f9ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/053d9fad71c6a99176ef247e41a9c2ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
(2)设数列
![](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/2eefaac815a7a86c454c80f24b39872f.png)
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2023-12-17更新
|
1733次组卷
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5卷引用:安徽省卓越县中联盟2024届高三上学期第三次质量检测数学试题
安徽省卓越县中联盟2024届高三上学期第三次质量检测数学试题湖南省长沙市湖南师大附中2024届高三上学期月考(四)数学试题(已下线)专题10 数列不等式的放缩问题 (7大核心考点)(讲义)(已下线)题型18 4类数列综合(已下线)信息必刷卷05(江苏专用,2024新题型)
真题
名校
4 . 已知
是等差数列,
.
(1)求
的通项公式和
.
(2)设
是等比数列,且对任意的
,当
时,则
,
(Ⅰ)当
时,求证:
;
(Ⅱ)求
的通项公式及前
项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c35e133418e9dbd8f81528b4b7ff9c25.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e8e5b901d8f8a8b6ec7740f1b55ed4.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83a6bc55d5eb2c3d085b62ffcd8d138d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2daddb01510526b8fa639b18635e986d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e7d5ea07ebd45f587cbab2b3fd77ba.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c972cbd63decec197aec1bdc306de67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99380bd8acd91cb1ffbd49e896d34f1d.png)
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2023-06-08更新
|
12571次组卷
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23卷引用:安徽省六安第一中学2024届高三适应性考试数学试题
安徽省六安第一中学2024届高三适应性考试数学试题2023年天津高考数学真题(已下线)专题7 等比数列的性质 微点2 等比数列前n项和的性质专题05数列(成品)(已下线)专题15 数列不等式的证明 微点1 反证法证明数列不等式(已下线)专题11 数列前n项和的求法 微点1 公式法求和(已下线)2023年天津高考数学真题变式题16-20江苏省淮阴中学等四校2023-2024学年高三上学期期初联考数学试题河北省邢台市邢台部分高中2024届高三上学期11月期中数学试题(已下线)第05讲 数列求和(练习)宁夏银川市第二中学2023-2024学年高二上学期月考二数学试卷(已下线)等差数列与等比数列(已下线)第3讲:数列中的不等问题【练】(已下线)重难点03:数列近3年高考真题赏析-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)(已下线)专题6.2 等比数列及其前n项和【十大题型】(已下线)重难点10 数列的通项、求和及综合应用【九大题型】(已下线)专题30 等比数列通项与前n项和(已下线)专题21 数列解答题(文科)-3(已下线)专题21 数列解答题(理科)-3专题06数列专题11数列(已下线)三年天津专题09数列(已下线)五年天津专题09数列
解题方法
5 . 在
与
中间插入
个数,使得这
个数构成递增的等比数列,将这
个数的乘积记为
,数列
满足
,记
和
分别为数列
,
的前
项和.
(1)求数列
的通项公式;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158b045c6172c4178d7aa52083e1489f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3468a665ac713ab7b400c672f19650a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3468a665ac713ab7b400c672f19650a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcad9ec2f0434f7cada636514e411833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b08b5809b40e99bb0581cd95c971fe.png)
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解题方法
6 . 已知正整数数列
,
,
,当
时,
恒成立.
(1)证明:数列
是等比数列并求出其通项公式;
(2)定义:
表示不大于x的正整数的个数.设数列
的前n项和为
.求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700b80130fb1be6e872ab47c7656506e.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)定义:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dc51e97939a8966daa015535a801561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f714d41279567d6b920d3b85d9ded9aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7dd2d5965496aefa08f70e337bacd76.png)
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7 . 已知
,点
在函数
的图象上,
.
(1)证明:数列
是等比数列;
(2)求
及数列
的通项公式;
(3)记
,求数列
的前
项和
,并证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44042d110ad8bf676c2785c2b1f9a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becd598a11b876d858728161a7a09705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c876135b6cce354d27d3e36f1fc017d4.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/136eaf36d164bf5ac378a4401c25263b.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad75f8318b09f86fdd2af419e86ee291.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b5417778d289001d3eaf94679e03edd.png)
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2021-09-21更新
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6卷引用:【市级联考】安徽省定远重点中学2019届高三上学期期中考试数学(文)试题
8 . 记
为数列
的前
项和,已知
,且
.
(1)求数列
的通项公式;
(2)已知数列
满足________,记
为数列
的前
项和,证明:
.
从①
②
两个条件中任选一个,补充在第(2)问中的横线上并作答.
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/176cdb96d098644685b0b445e8c41cc7.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.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/9c3fec47d2dd2b8099d86c87b6e57de8.png)
从①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9307fdd2c1a032c31d6443a065173028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c888b1f283a389a3878f1cb23fea67.png)
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2022-04-13更新
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7卷引用:安徽省合肥市2022届高三下学期第二次教学质量检测理科数学试题
安徽省合肥市2022届高三下学期第二次教学质量检测理科数学试题(已下线)4.4 求和方法(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)专题27 数列求和-2甘肃省兰州市第六十一中学2022-2023学年高三上学期11月期中考试理科数学试题(已下线)第7讲 数列求和9种常见题型总结 (2)重庆市开州中学2024届高三上学期第二次考试数学试题(已下线)专题05 数列 第三讲 数列与不等关系(解密讲义)
名校
9 . 已知数列
和
满足
,
,
.
(1)证明:
是等比数列,
是等差数列;
(2)若
,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/ee423d15df9804185bf5242e75f501cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d807a81b4f3c1503bc8447f437bf91c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/326a11bac583ee0eda8ebea723c103e2.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5344eadd4711db34e3f935aedd5fb270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec12a9a60f82467bf7bf834a9a9b1f7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a9cb389ad8e9aa57d822096810ea1c.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/08eb71ecf8d733b6932f4680874dbbf3.png)
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10 . 已知数列
的前
项和为
,且
对任意
都成立.
(Ⅰ)求
的值;
(Ⅱ)证明数列
是等比数列,并求出数列
的通项公式;
(Ⅲ)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/3fe95f40a1e521341a31cb2e91f403fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0158862238e250d2a2598b7d4ecd148.png)
(Ⅱ)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a080c94bf1ffea8d5af10f9688978fb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅲ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd0f044dc82a12fd1c71872f2ac12d06.png)
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2020-03-09更新
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4卷引用:安徽省黄山市八校联盟2018-2019学年高一下学期期中数学试题