1 . 已知数列
的首项
,
是
与
的等差中项.
(1)求证:数列
是等比数列;
(2)证明:
.
![](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/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2de706dc5f0439b989273a5367f63a.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7fa65c121c7b361e141deaeee7a1d67.png)
您最近一年使用:0次
2023-10-30更新
|
1950次组卷
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9卷引用:四川省宜宾市南溪第一中学校2024届高三上学期一诊考试理科数学模拟试题
四川省宜宾市南溪第一中学校2024届高三上学期一诊考试理科数学模拟试题黑龙江省百师联盟2024届高三一轮复习联考(二)数学试题甘肃省部分校2024届高三上学期10月质量检测数学试题(已下线)模块四 专题6 大题分类练(数列)基础夯实练(人教A)(已下线)第二篇 “搞定”解答题前3个 专题2 数列解答题【练】高三逆袭之路突破90分黑龙江省佳木斯市三校联考2024届高三上学期第三次调研考试数学试题(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)黄金卷08(已下线)题型18 4类数列综合
2 . 已知数列
的前n项和为
,且满足
.
(1)证明:数列
是等比数列;
(2)记
,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/694469ac77ae7c840a2f206dc2b5da89.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e764296a62a7def78e39370f746b4663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da72309d2507e2f5e5ed88d8cc08963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf49305249eb983fb10c95c2287d1ee.png)
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2023-08-18更新
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1599次组卷
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4卷引用:四川省2023届高三诊断性检测文科数学试题
四川省2023届高三诊断性检测文科数学试题四川省仁寿县铧强中学2024届高三上学期9月诊断性考试理科数学试题广东省揭阳市普宁市第二中学2023-2024学年高三上学期第一次月考数学试题(已下线)第二篇 “搞定”解答题前3个 专题2 数列解答题【练】高三逆袭之路突破90分
3 . 已知各项均不为零的数列
的前n项为为
,且满足
.
(1)证明:数列
是等比数列;
(2)若
,
,
成等差数列,记
,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/871efdbd31a7c8886a3970447fe749dc.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc17ca3ab612ea9cf6cfa1eea53cb1eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2694813e9fe254366e041221c81ba504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1341feb191e5db2ff020502ca1c216b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02f2a36a909d0e9f0eb3a9281eb6213d.png)
您最近一年使用:0次
4 . 设数列
的前
项和为
,若
,
.
(1)证明
为等比数列;
(2)设
,数列
的前
项和为
,求
;
(3)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/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5756b52620214f1ead98030c6a7cb81.png)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c895d4ce5ce82ef9b311b9369b4de11.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b008e35e4367db818d464d31bd2248c.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbfc690ace28306596f1fa5c88fa3c3d.png)
您最近一年使用:0次
2022-05-17更新
|
308次组卷
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2卷引用:四川省绵阳南山中学2021-2022学年高一下学期期中考试数学试题
解题方法
5 . 设数列
的前n项和为
,前n项积为
,且
.
(1)求证:数列
是等比数列;
(2)求数列
的通项公式及前n项和
;
(3)证明:
.
![](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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fafaaa16f492df2dfe80b904ead6fb02.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf3da897eb73b729f66bb0d700775c5.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ef731ed306ad403782ca0a1c9961a6.png)
您最近一年使用:0次
名校
解题方法
6 . 已知数列
的前n项和
满足
.
(1)证明:数列
是等比数列;
(2)设数列
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/d3cab1c977bfc938b7b865c16312aacf.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e18eb693f55edd2b9f26d3a7010d25.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/203a63ef29b384faa8ee3b7ae870ba2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1056f02e4a7e9b8fd479519eec2d9b3.png)
您最近一年使用:0次
2022-07-07更新
|
2286次组卷
|
6卷引用:四川省绵阳南山中学实验学校补习版2023届高三一诊模拟考试理科数学试题
四川省绵阳南山中学实验学校补习版2023届高三一诊模拟考试理科数学试题山西省大同市2023届高三上学期第一次学情调研数学试题(已下线)专题27 数列求和-2(已下线)第7讲 数列求和9种常见题型总结 (2)1.3.2 等比数列与指数函数(同步练习提高版)(已下线)第四节 数列求和 A素养养成卷
名校
解题方法
7 . 《见微知著》谈到:从一个简单的经典问题出发,从特殊到一般,由简单到复杂,从部分到整体,由低维到高维,知识与方法上的类比是探索发展的重要途径,是发现新问题、新结论的重要方法.
例如,已知
,求证:
.
证明:原式
.
波利亚在《怎样解题》中也指出:“当你找到第一个蘑菇或作出第一个发现后,再四处看看,他们总是成群生长.”类似上述问题,我们有更多的式子满足以上特征.
请根据上述材料解答下列问题:
(1)已知
,求
的值;
(2)若
,解方程
;
(3)若正数
满足
,求
的最小值.
例如,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180409002586c7e3c2e06f6fdd742f65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f45fc0d73e11222c72a9afbfa9d091b3.png)
证明:原式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4b25c598517637dc8234d567f344be.png)
波利亚在《怎样解题》中也指出:“当你找到第一个蘑菇或作出第一个发现后,再四处看看,他们总是成群生长.”类似上述问题,我们有更多的式子满足以上特征.
请根据上述材料解答下列问题:
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180409002586c7e3c2e06f6fdd742f65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e62883c4d3d8de9ac5b8eed793d5bd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52431587ef305ddb410bece4a6d76ee3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d91c584d15767339f6e84b78dddaf9b.png)
(3)若正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c48e4da908f869244dd5ba4dd3b4a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180409002586c7e3c2e06f6fdd742f65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46efe66dfaaf30d5f5969a4d1d6b8414.png)
您最近一年使用:0次
2022-10-21更新
|
436次组卷
|
4卷引用:四川省成都市第七中学2023年高三上学期1月月考数学文科试题
四川省成都市第七中学2023年高三上学期1月月考数学文科试题四川省攀枝花市第三高级中学校2023-2024学年高一上学期10月月考数学试题广东省中山市2022-2023学年高一上学期第一次调研数学试题(已下线)第03讲 第二章 一元二次函数、方程和不等式章节综合测试-【练透核心考点】
名校
解题方法
8 . 已知函数
的定义域为
,对任意的
,都有
,且当
时,
.
(1)求证:
是奇函数;
(2)判断
在
上的单调性,并加以证明;
(3)解关于
的不等式
,其中常数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ab4b75fa22deba7fcbcdcb31dd45b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0c6f119137e1b6760d55956d99d963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
(3)解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fead001b62440b98f15ef4cabfd2c0b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
您最近一年使用:0次
2022-02-11更新
|
368次组卷
|
3卷引用:四川省遂宁中学校2020-2021学年高一下学期第一次月考数学试题
9 . 设数列
的前n项和为
,已知
,
(
).
(1)求证:数列
为等比数列;
(2)若数列
满足:
,
.
(i) 求数列
的通项公式;
(ii)若数列
的前n项和为
,证明:
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bac7288093b7d91a6c4f50003b990476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c88e5b562e58c3d2b67ccdfe0092d01c.png)
(i) 求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(ii)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebdf072477557ad3dbc7acfa8088436d.png)
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2022-05-24更新
|
364次组卷
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2卷引用:四川省南充市白塔中学2021-2022学年高一下学期第四次(5月)月考数学(文)试题
名校
解题方法
10 . 选用恰当的证明方法,证明下列不等式.
(1)已知
,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfbefc06b3b4e54a6a1690e870efc69b.png)
(2)已知a,b,c为正数,且满足
.证明:
;
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a521891098b625f372ff648d110afe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfbefc06b3b4e54a6a1690e870efc69b.png)
(2)已知a,b,c为正数,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56667aabbe787eb1c3189d487d203e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3681a97ebef383e8968347548102fb49.png)
您最近一年使用:0次
2021-11-07更新
|
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3卷引用:四川省泸县第一中学2023-2024学年高一上学期10月月考数学试题