名校
1 . 已知
是数列
的一个递推公式,其中
且
,若
,则满足条件的实数
的所有可能值的和为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/023784818034e7213016e21655693abd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823ab696d27d40920c39b8c910789380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a369ce3949b2bd2747a48054f7b951c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9aca5f07f327e9e366c02b5a27536ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2 . 设数列
的前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46caae83a3d839b68c8b1153093b340c.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ef7fade67001f9d4f7825857c17567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46caae83a3d839b68c8b1153093b340c.png)
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3 . 已知
轴上的点
、
、…、
满足
,射线
上的点
、
、…、
满足
,
,则四边形
的面积
的取值范围为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e92b8041e98e4f435acdbeb983efbe46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5755123f876868394b160608317eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b25286f6029da66ce5270aacd05184f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad2206925716403c243a10f6c534392a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e49f0172de00b37e1f3861a751a57dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da0eb3662f64f56c090473cbabb4814.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/420f40c58d5518aea8e83a99074807d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65433a22b15ea4e75432d74a1ccf3b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/687bbc662e93519ef9acc477935d7005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1505d56f0b35fe7f2de1fe1888036e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46bc1dfb9a0c62a95db470d4748fd35c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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2022-03-24更新
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4卷引用:上海交通大学附属中学2023-2024学年高二上学期10月月考数学试题
名校
4 . 已知等差数列
的通项公式为
,等比数列
满足
,
,且数列
中的每一项都是数列
中的项,则所有满足上述条件的p组成的集合为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47dee512e0fdb19fc03858ce717ce8b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aaee408bdec05bbdfcd4b841a331e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1feee79aea482af51e8e7420f75375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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解题方法
5 . 在四棱锥
中,底面
为平行四边形,
为边
的中点,
为边
上的一列点,连接
,交
于
,且
,其中数列
的首项
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032a8ca8758ddc49c082021bd940f04f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae38f26e59bbb8b138ff0898e1f7493.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9445875e1d2f78a79c38a04897435418.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d97efc3672b0d033abea91c050aae2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bae03ee4ac75dacfb026290e4207dd.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2022-01-26更新
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718次组卷
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3卷引用:上海市行知中学2021-2022学年高二下学期3月月考数学试题
21-22高三上·上海浦东新·阶段练习
6 . 某企业为一个高科技项目注入了启动资金1000万元,已知每年可获利25%,但由于竞争激烈,每年年底需从利润中抽取200万元资金进行科研、技术改造与广告投入,方能保持原有的利润增长率,设经过n年后,该项目的资金为an万元.
(1)求a1、a2;
(2)设
, 证明数列{bn}为等比数列,并求出至少需经过多少年,该项目的资金才可以达到或超过翻两番(即为原来的4倍)的目标(取lg2=0.3 );
(3)若
,求数列
的前n项和Sn.
(1)求a1、a2;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50ee4bac8bd5424a924e5b72e40dbfd9.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e38242434ddc582d813876acd4b71b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
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2021-12-17更新
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6卷引用:上海市吴淞中学2021-2022学年高二上学期期末数学试题
上海市吴淞中学2021-2022学年高二上学期期末数学试题(已下线)上海市华东师范大学第二附属中学2022届高三上学期12月月考数学试题(已下线)2020年高考全国3数学理高考真题变式题16-20题(已下线)数学-2022届高三下学期开学摸底考试卷(上海专用)云南省曲靖市曲靖一中麒麟学校2021-2022学年高二上学期期末过关卷三(A卷)数学试题云南省曲靖一中麒麟学校2021-2022学年高二上学期期末摸底考试数学试题
名校
7 . 已知等比数列
的各项均为正数,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c59f25f5476a4c9345a15125be74941.png)
__________ ﹒
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b417be45dcacc8539ef8170ba693dca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c59f25f5476a4c9345a15125be74941.png)
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2021-12-15更新
|
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2卷引用:上海交通大学附属中学2021-2022学年高一下学期5月线上月考数学试题
8 . 某项测试有
道必答题,甲和乙参加该测试,用数列
和
记录他们的成绩.若第
题甲答对,则
,若第
题甲答错,则
;若第
题乙答对,则
,若第
题乙答错,则
.已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fca3a54951441f67c18b21d1a36260.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.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/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea867f78d52b7382c38e8fc6e2e2a9c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779579670dc48b0c0a9d31ed4df1e8ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47198e0da35b71d989eb679b517158f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22cd4e24144887b41b2d5eede1cbb97b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7325f0500a3f719a3c6184422be73a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e8810d81198b0a48cdc551a7c5f2f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fca3a54951441f67c18b21d1a36260.png)
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2021-11-21更新
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410次组卷
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3卷引用:上海交通大学附属中学2021-2022学年高一下学期5月线上月考数学试题
名校
解题方法
9 . 设
,
分别为等比数列
,
的前
项和.若
(
,
为常数),则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707e4f53430a9bd4caf8a112af9bb9cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe7b2750448b78af0109d978b0f4143.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-10-25更新
|
1718次组卷
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6卷引用:上海交通大学附属中学2021-2022学年高一下学期5月线上月考数学试题
上海交通大学附属中学2021-2022学年高一下学期5月线上月考数学试题河南省郑州市郊县2020-2021学年高二上学期期中考试数学(理)试题(已下线)专题27 等差数列与等比数列问题的精彩妙解-备战2022年高考数学一轮复习一网打尽之重点难点突破黑龙江省哈尔滨德强学校2021-2022高三(清北班)上学期期中线下考试数学(理)试题江苏省泰兴、如皋四校2021-2022学年高二下学期期末联考数学试题广东省中山市2022-2023学年高二下学期期末数学试题
10 . 如果有穷数列
(m为正整数)满足条件
,即![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d58e15de1b07667b44bb0e187d43965.png)
,我们称其为“对称数列”.例如,数列1,2,5,2,1与数列8,4,2,2,4,8都是“对称数列”.
(1)设
是项数为7的“对称数列”,其中
是等差数列,且
.依次写出
的每一项;
(2)设
是49项的“对称数列”,其中
是首项为1,公比为2的等比数列,求
各项的和S;
(3)设
是100项的“对称数列”,其中
是首项为2,公差为3的等差数列.求
前n项的和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f42beacb05b4e0ef7bc5054d963657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd77932c26ce24576308c4ed4ffaff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d58e15de1b07667b44bb0e187d43965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c410d893ae9b389262bcd6553ed02bbe.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a447e5baee4f7518706498d4aca7553b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37315fc505a5be225c5b2d0aa3f5025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88f01c3f7abc6fb390b5f9bcbeef700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d717398566e4a7769dc4bb6865195f0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45404a6c16a16968629c5e03a3fcdbc4.png)
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2022-11-09更新
|
390次组卷
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3卷引用:上海市同洲模范学校2017-2018学年高二下学期3月月考数学试题