解题方法
1 . 已知
,点
在函数
的图象上,其中
,2,3,….
(1)证明:数列
是等比数列;
(2)设
,求
;
(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/c87b351f16728b0023fd63678f8103c7.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/136eaf36d164bf5ac378a4401c25263b.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dcb85c82da95d9e7ce79b31a8184941.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.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/5737f1f9cad2471f3ca53241b25a1eb9.png)
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2020-10-27更新
|
551次组卷
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2卷引用:吉林省松原市乾安县第七中学2020-2021学年高二上学期第一次教学质量检测数学(理)试题
2 . 已知数列
的前
项和为
,且满足
,
.
(Ⅰ)求数列
的通项公式;
(Ⅱ)数列
满足
,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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27618483d5ada266aae94a20cd282a14.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅱ)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc00b5cae38e4283d570bcdb5ce482cc.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/49c7194d4cb8417e0aaa76fb0566bd02.png)
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名校
3 . 已知数列
满足
,
(
为常数,且
).
(1)证明:
为等比数列;
(2)当
时,求数列
的前几项和最大?
(3)当
时,设
,数列
的前
项和为
,若不等式
对任意的
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af8ce50e2332f2caf003212ac5872720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66185a20b0188181e6c756405f8d6486.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98eb63b0f2484c8d6d3cdec24ce396e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77c6567f8d9002b4eea03afad8a5c404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aeb9a94e392f6759b18abed89aacc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d1e1f73432895c2807ee3d829c7ca30.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd01e5df798ca3b7728f2d313281a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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4 . 已知数列
是等比数列,且公比
不等于
,数列
满足
.
(1)求证: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/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbad805fcac1ea944f45d8e4682f8e24.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7824b2fbbd873328b3e5cce31694999.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d95b94ae3419827e7b78d4111ee96e8.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
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解题方法
5 . 设Sn为数列{an}的前n项和,已知a2=3,an+1=2an+1.
(1)证明:{an+1}为等比数列;
(2)求{an}的通项公式,并判断n,an,Sn是否成等差数列?说明理由.
(1)证明:{an+1}为等比数列;
(2)求{an}的通项公式,并判断n,an,Sn是否成等差数列?说明理由.
您最近一年使用:0次
2020-08-21更新
|
451次组卷
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14卷引用:【市级联考】吉林省吉林市2019届高三上学期第一次调研测试数学文科试卷
【市级联考】吉林省吉林市2019届高三上学期第一次调研测试数学文科试卷【校级联考】吉林省吉林市普通中学2019届高三第一次调研测试数学(文)试题2020届广东省中山市高三上学期期末数学(文)试题2020届广东省中山市高三上学期期末数学(理)试题2020届高三2月第01期(考点06)(文科)-《新题速递·数学》(已下线)专题05 等差数列和等比数列的证明问题(第二篇)-备战2020年高考数学大题精做之解答题题型全覆盖(已下线)专题08 数列——2020年高考真题和模拟题理科数学分项汇编(已下线)专题08 数列——2020年高考真题和模拟题文科数学分项汇编(已下线)专题6.5 高考解答题热点题型---数列的综合应用-2021年高考数学(理)一轮复习-题型全归纳与高效训练突破(已下线)专题6.5 高考解答题热点题型---数列的综合应用-2021年高考数学(文)一轮复习-题型全归纳与高效训练突破广东省普宁市2020-2021学年高二上学期期中质量测试数学试题(已下线)2021届高三高考数学适应性测试八省联考考后仿真系列卷二2021届辽宁省辽南协作校(朝阳市)高三第二次模拟考试数学试题江苏省镇江市扬中市第二高级中学2021届高三下学期期初开学考试数学试题
6 . 已知数列
满足,
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0f129b7aa70609947e1fe973e104d7.png)
.
(1)求证:数列
为等比数列,并求出数列
的通项公式;
(2)设
,求数列
的前
项和
.
![](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/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0f129b7aa70609947e1fe973e104d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5bc2b05dc79b18ecb4ac3f9b5c492d4.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82c65a855b1eed9c43e6829f6c3bffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc1f3466622a3a27a7b6013e7748b06.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)
您最近一年使用:0次
7 . 已知数列
中,
,
,
.
(1)求证:数列
是等比数列;
(2)求数列
的通项公式;
(3)设
,
,若对任意
,有
恒成立,求实数m的取值范围.
![](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/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a9e3158c47e2c1c4045bb9413361f4.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82c65a855b1eed9c43e6829f6c3bffb.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128d43fbfe37d2334f8666239efc7e32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/786786714916d0e16f073371db5ce23a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde41a3b4eba4fadb5fb6b824aef15fb.png)
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2020-07-11更新
|
577次组卷
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8卷引用:【全国百强校】吉林省实验中学2017-2018学年高一下学期期中考试数学试题
【全国百强校】吉林省实验中学2017-2018学年高一下学期期中考试数学试题【全国百强校】广西陆川县中学017-2018学年高一下学期期中考试数学(理)试题黑龙江省大庆实验中学2019-2020学年高一下学期第一次阶段考试数学试题江西省南昌市豫章中学2019-2020学年高一下学期5月月考黑龙江省哈尔滨市双城区兆麟中学2019-2020学年度高一下学期期中考试数学试题苏教版(2019) 选修第一册 必杀技 第四章 4.3.3 课时2 等比数列的前n项和(2)天津市北辰区第四十七中学2021-2022学年高三上学期期中数学试题天津市第三中学2021-2022学年高三上学期12月阶段性测试数学试题
名校
解题方法
8 . 已知
是等差数列
的前
项和,
.
(1)证明:
成等差数列;
(2)若数列
满足
,且
,求
的前
项和
.
![](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/963b5cbf8139f3a2bcd098bb8e2e9642.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf8b05d060d51cb173e159bcf88baeda.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0680d6ee71991131ec8c0626d39fecb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494a1444abd3f9441b30d999f65b3203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b647ac8a8174071a4f332a00b5507b.png)
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9 . 设数列
满足
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
(1)求证: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/f5776d88fe79c50af7bc6a60cb2cd3b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c033d0d59a0767eea50d0afa4737e4.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2020-02-15更新
|
1223次组卷
|
9卷引用:吉林省长春外国语学校2019-2020学年高二上学期期末数学(理)试题
吉林省长春外国语学校2019-2020学年高二上学期期末数学(理)试题2019届重庆市南开中学高考模拟(7)理科数学试题重庆市南开中学2019-2020学年高三下学期3月月考数学(理)试题四川省宜宾市第四中学校2019-2020学年高三下学期第二次月考数学(理)试题四川省宜宾市第四中学校2019-2020学年高三下学期第二次月考数学(文)试题(已下线)第02章等比数列(A卷基础卷)-2020-2021学年高二数学必修五同步单元AB卷(苏教版,新课改地区专用)湖北省恩施州高级中学2019-2020学年高一下学期期末数学试题新疆皮山县高级中学2020-2021学年高一下学期期中考试数学试题(已下线)第4章 等比数列(A卷·夯实基础)-2021-2022学年高二数学同步单元AB卷(苏教版2019选择性必修第一册)【学科网名师堂】
名校
10 . 已知数列
和
满足:
,
其中
为实数,
为正整数.
(1)对任意实数
,证明数列
不是等比数列;
(2)对于给定的实数
,试求数列
的前
项和
;
(3)设
,是否存在实数
,使得对任意正整数
,都有
成立?若存在,求
的取值范围;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47769ca08edfa79fc200b9f37d197335.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1c0929db530cafe5fae890c27cc5e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)对任意实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)对于给定的实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.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/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e14206c7d228a7c2259a7b27da8813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5262075c58ead2118218b4c5c606312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2019-12-02更新
|
439次组卷
|
3卷引用:吉林省延边朝鲜族自治州延吉市第二中学2019-2020学年高二上学期期中数学(文)试题
吉林省延边朝鲜族自治州延吉市第二中学2019-2020学年高二上学期期中数学(文)试题高中数学解题兵法 第八十讲 数学解题、四大环节(已下线)专题17 数列探索型、存在型问题的解法 微点3 数列探索型、存在型问题综合训练