1 . 已知数列
满足
,
.
(1)证明数列
是等比数列,并求数列
的通项公式;
(2)若
,数列
的前
项和
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1220efe972fe0616ee1a7453a864296.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a12d49c20651d938958a4534fb97b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b56f138e8acfb2ab01862bea78d424.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/94351ce858fa3f3a09cfadc2d23d7253.png)
您最近一年使用:0次
2023-04-28更新
|
3409次组卷
|
10卷引用:专题05 等比数列与数列综合求和-2023-2024学年高二数学期末复习重难培优与单元检测(人教A版2019)
(已下线)专题05 等比数列与数列综合求和-2023-2024学年高二数学期末复习重难培优与单元检测(人教A版2019)(已下线)专题6.2 等比数列及其前n项和【十大题型】广东省潮州市2023届高三二模数学试题 重庆市巴蜀中学校2023届高三下学期4月月考数学试题(已下线)专题10 数列通项公式的求法 微点7 对数变换法(已下线)第04讲 数列的通项公式(十六大题型)(讲义)-2(已下线)山东省济南市2022-2023学年高三上学期期中数学试题变式题19-22(已下线)专题05 数列通项与求和广东省深圳市华朗学校2023届高三下学期适应性考试数学试题山东省烟台市蓬莱区两校2023届高三三模联考数学试题
名校
解题方法
2 . 已知数列
为数列
的前n项和,且
.
(1)求数列
的通项公式;
(2)求证:
;
(3)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa2400f7c3789ea51e238dc193167102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a370de02d7c4e5e7bf601eba5de016b4.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946cca301525e6dcb842ea04dde3b1db.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5950369eb310c285e656600a5d8215.png)
您最近一年使用:0次
2022-09-23更新
|
2385次组卷
|
9卷引用:压轴题05数列压轴题15题型汇总-1
解题方法
3 . 已知数列
满足
.
(1)求
的通项公式;
(2)设
,记数列
的前
项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3312e4dd0bcc0526eabf94f59cd1835.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ad738dc3a9c27a05fbb0eb65d403d9.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/e8695875aded32578fcc9a86177b1ea6.png)
您最近一年使用:0次
4 . 已知数列
满足
,
.
(1)求
(只需写出数值,不需要证明);
(2)若数列
的通项可以表示成
的形式,求
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9cff1a9ceaafab92feca53e701b150.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11075f2c574b6c59b97fb3038000e38.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e3dea299864c6380204510c790af929.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
您最近一年使用:0次
解题方法
5 . 入冬以来,东北成为全国旅游和网络话题的“顶流”.南方的小土豆们纷纷北上体验东北最美的冬天,这个冬天火的不只是东北的美食、东北人的热情,还有东北的洗浴中心,拥挤程度堪比春运,南方游客直接拉着行李箱进入.东北某城市洗浴中心花式宠“且”,为给顾客更好的体验,推出了
和
两个套餐服务,顾客可自由选择
和
两个套餐之一,并在App平台上推出了优惠券活动,下表是该洗浴中心在App平台10天销售优惠券情况.
经计算可得:
,
,
.
(1)因为优惠券购买火爆,App平台在第10天时系统出现异常,导致当天顾客购买优惠券数量大幅减少,现剔除第10天数据,求
关于
的经验回归方程(结果中的数值用分数表示);
(2)若购买优惠券的顾客选择
套餐的概率为
,选择
套餐的概率为
,并且
套餐可以用一张优惠券,
套餐可以用两张优惠券,记App平台累计销售优惠券为
张的概率为
,求
;
(3)记(2)中所得概率
的值构成数列
.
①求
的最值;
②数列收敛的定义:已知数列
,若对于任意给定的正数
,总存在正整数
,使得当
时,
,(
是一个确定的实数),则称数列
收敛于
.根据数列收敛的定义证明数列
收敛.
参考公式:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
日期![]() | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
销售量![]() | 1.9 | 1.98 | 2.2 | 2.36 | 2.43 | 2.59 | 2.68 | 2.76 | 2.7 | 0.4 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/decf6657efa807fc90353c5e6be0a263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0064de1b957bc9b668565180e34f6f19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f36001b6081f8168466384adb24065c.png)
(1)因为优惠券购买火爆,App平台在第10天时系统出现异常,导致当天顾客购买优惠券数量大幅减少,现剔除第10天数据,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若购买优惠券的顾客选择
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33adb74906403b0b00fcbd9fa691d8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
(3)记(2)中所得概率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd7841ef44b17863697517fb5f3039d.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
②数列收敛的定义:已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711c92626a97e6b778b3aa86e663ee97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ccd4537f4dee2050ade38b972eb9b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/985dc26a89252b2e8dea815c529a2ffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512e8bacfff15253901cd216a1e42013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c5a325806df1a1c3e7ce609fe99085f.png)
参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa225ad36ee50c40869d87f694b6c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58291bd91befe1061530246da983727.png)
您最近一年使用:0次
2024-04-17更新
|
1694次组卷
|
4卷引用:东北三省四市教研联合体2024届高考模拟(一)数学试卷
东北三省四市教研联合体2024届高考模拟(一)数学试卷东北三省四城市联考暨沈阳市2024届高三下学期数学质量检测(二)(已下线)专题03 第七章 随机变量及其分布列--高二期末考点大串讲(人教A版2019)江西省宜春市丰城市第九中学2023-2024学年高二下学期4月期中考试数学试题
解题方法
6 . 已知数列
的前
项和为
,
,且当
时,
,
(1)证明:数列
是等差数列;
(2)设数列
满足
,求
的值.
![](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/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317e67653c0733cd4e7b7dd6cec3b8a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f900ba399dafa9559e3ed0b7f4353b.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8050391385b496e9c059201e4f12600a.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3c9dc190d0856e27a1cc225f766808e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4922d997751c81161ce4f72cc3f430.png)
您最近一年使用:0次
7 . 已知数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baace4b72eca0616a42834e515210a01.png)
(1)写出
;
(2)证明:数列
为等比数列;
(3)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baace4b72eca0616a42834e515210a01.png)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed529240a883f68f0921e818addeb9c8.png)
(2)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff9341a8e07b3e0af5b65ab199a25b0c.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/314501f06c7e4bf3112fe41ecac7be68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762bc360e4431d503ae8bd147d5a288c.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
2024-04-16更新
|
1972次组卷
|
5卷引用:河北省石家庄市2024届高三下学期教学质量检测(二)数学试卷
河北省石家庄市2024届高三下学期教学质量检测(二)数学试卷(已下线)第二套 艺体生新高考全真模拟 (二模重组卷)(已下线)5.3 数列的求和问题(高考真题素材之十年高考)(已下线)压轴题05数列压轴题15题型汇总-1陕西省西安市西安中学2024届高三仿真考试(一)数学试题
8 . 已知数列
的各项均为正数,
,
.
(1)若
,证明:
;
(2)若
,证明:当
取得最大值时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf8c4060c7a614a2f287e9fa8fd9f627.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc76b19bc1a1ee03bdbf33faed8822eb.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2693734765399876e9e93cdb110231c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f91f6478219ac36d487e8bb204b1f908.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f399ee7a3b43ed8b3a4caf717863ef89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1458e2d74ec7c75966ff4a772f2891a6.png)
您最近一年使用:0次
名校
9 . 学校食堂为了减少排队时间,从开学第
天起,每餐只推出即点即取的米饭套餐和面食套餐.某同学每天中午都会在食堂提供的两种套餐中选择一种套餐,若他前
天选择了米饭套餐,则第
天选择米饭套餐的概率为
;若他前
天选择了面食套餐,则第
天选择米饭套餐的概率为
.已知他开学第
天中午选择米饭套餐的概率为
.
(1)求该同学开学第
天中午选择米饭套餐的概率;
(2)记该同学开学第
天中午选择米饭套餐的概率为
证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
(1)求该同学开学第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(2)记该同学开学第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445f165254323f929f21d3a270c4eb53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/472fefe699c4efa8c0af312c16ea0811.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b024509a31ff4217b12701c328dbd5b1.png)
您最近一年使用:0次
2024-04-13更新
|
2345次组卷
|
4卷引用:山东省菏泽第一中学人民路校区2024届高三下学期3月月考数学试题
山东省菏泽第一中学人民路校区2024届高三下学期3月月考数学试题安徽省黄山市2024届高中毕业班第二次质量检测数学试题(已下线)7.1.2 全概率公式——课后作业(巩固版)重庆市万州第二高级中学2023-2024学年高二下学期期中质量监测数学试题
名校
解题方法
10 . 已知等差数列
的前
项和为
,
且
,数列
满足
,设
.
(1)求
的通项公式,并证明:
;
(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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6fc93e6615bf4c1a2115d318aff007.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/817c2cae1c70dfe804155469ede46b1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/272b44a71d0bec02b3c4f3f05304f942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15520cf5be7c2685975aac51bc99ac4f.png)
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2024-04-28更新
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3卷引用:河南省漯河市高级中学2024届高三下学期4月强化拉练一数学试题