1 . 已知等差数列
的首项为1,前
项和为
,且
是3与
的等比中项.
(1)求数列
的通项公式:
(2)若
是数列
的前
项和,求
的最小值.
![](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/eb0f10a8a67a3b6c595745f9a82b45b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d29ed246168b03ba97deedbd0c26d373.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba57c83d526ac308d1461e80fcca9f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2 . 中中国古代数学著作《算法统宗》中有这样一个问题:“三百七十八里关,初行健步不为难,次日脚痛减一半,六朝才得到其关,要见次日行里数,请公仔细算相还.其意思是:有一个人要走378里路,第一天健步行走,从第二天起因为脚痛,每天走的路程为前一天的一半,走了6天后到达目的地,请问第二天走了__________ 里.
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解题方法
3 . 数列
中,
是其前
项的和,若对任意正整数
,总存在正整数
,使得
,则称数列
为“某数列”
现有如下两个命题:①等比数列
为“某数列”;②对任意的等差数列
,总存在两个“某数列”
和
,使得
.则下列选项中正确的是( )
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3693c7c942afef5517a3c18997c878df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a97e99f49ad1998d2858e1963aa45de.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/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6076227a7a825358aeb27b5633613a2c.png)
A.①为真命题,②为真命题 | B.①为真命题,②为假命题 |
C.①为假命题,②为真命题 | D.①为假命题,②为假命题 |
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4 . 已知等比数列
中,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d36243198e5e20c56399e4ad5ac3c519.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/396644ff5ee3b70af1421d5e6e539e5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d36243198e5e20c56399e4ad5ac3c519.png)
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名校
解题方法
5 . 已知等比数列
的前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.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/97b794ed9de8e93de6e067c3d0259558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
您最近一年使用:0次
2024-03-21更新
|
788次组卷
|
3卷引用:上海市宝山区顾村中学2023-2024学年高二下学期3月阶段练习数学试题
解题方法
6 . 已知数列
满足:
.
(1)求证:
是等比数列;
(2)求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46588c9ccefccb767dc97c548bc60f9d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4599c3dcf05d964c4e67e2437e718580.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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2024-03-21更新
|
1182次组卷
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3卷引用:上海市宝山区顾村中学2023-2024学年高二下学期3月阶段练习数学试题
上海市宝山区顾村中学2023-2024学年高二下学期3月阶段练习数学试题上海市三林中学2023-2024学年高二下学期期中考试数学试卷(已下线)专题06 等差数列与等比数列(2)--高二期末考点大串讲(人教B版2019选择性必修第二册)
名校
7 . 已知数列
是等比数列,且
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de55832b1f7d605df8ecd9f192686ea1.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df9d984a84225980edf64be1f611627b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de55832b1f7d605df8ecd9f192686ea1.png)
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2024-01-15更新
|
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4卷引用:上海市上海师大附属宝山罗店中学2023-2024学年高二上学期期末诊断调研数学试题
上海市上海师大附属宝山罗店中学2023-2024学年高二上学期期末诊断调研数学试题广西壮族自治区百色市平果市铝城中学2023-2024学年高二下学期开学考试数学预测试题(已下线)专题01 数列(九大题型+优选提升题)-【好题汇编】备战2023-2024学年高二数学下学期期末真题分类汇编(沪教版2020选择性必修,上海专用)上海市徐汇中学2023-2024学年高一下学期期末考试数学试卷
名校
解题方法
8 . 已知数列
是公差为正的等差数列,其前
项和为
;各项都为正数的等比数列
满足
,
.
(1)求数列
,
的通项公式;
(2)记
,求数列
的前
项和
.
![](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/8ce817f902302ebdd5a599e43df77614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6050b9b620e2970b6022583a111f7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b3770d8799798a432f85aab3b0dbda.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/924d34bdcf394bef34ef2587e96630f5.png)
![](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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2023-11-13更新
|
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9 . 已知
是各项均为正实数的数列
的前n项和,
,若
,则实数m的取值范围是____________ .
![](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/55cfe3500a7c74bbe92c6c77a8ce3ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd3cb49234c927b2564c980c2bccb4f2.png)
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2024-03-31更新
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上海市宝山区吴淞中学2024届高三下学期3月月考数学试题1号卷·A10联盟2022届全国高考第一轮总复习试卷数学(文科)试题(十一)江西省南昌市江西师大附中2023-2024学年高二下学期3月月考数学试题(已下线)专题8 数列与不等式恒成立问题(一题多解)四川省成都市玉林中学2023-2024学年高二下学期3月诊断性评价数学试题(已下线)高二数学期末模拟试卷02【好题汇编】-备战2023-2024学年高二数学下学期期末真题分类汇编(北师大版2019选择性必修第二册)上海市嘉定区上海师范大学附属嘉定高级中学2023学年高二下学期期中考试数学试卷
10 . 已知数列
,若
为等比数列,则称
具有性质P.
(1)若数列
具有性质
,且
,求
的值;
(2)若
,判断数列
是否具有性质
并证明;
(3)设
,数列
具有性质
,其中
,试求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0dc13236eaa2bd0cdc0f24beea11fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a4970320426dc9117a94237e607475f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ef8f3a003fc34b75b71e5b6992cee6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/872e608c4f382670965d2876ae49fb35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/864fb22e698e7595dc8c8aaa7cd1d83b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24eabf172a5b445a7618a212931bddc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
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2023-07-03更新
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