1 . 已知无穷数列
,构造新数列
满足
,
满足
,
,
满足
,若
为常数数列,则称
为
阶等差数列;同理令
,
,
,
,若
为常数数列,则称
为
阶等比数列.
(1)已知
为二阶等差数列,且
,
,
,求
的通项公式;
(2)若
为
阶等差数列,
为一阶等比数列,证明:
为
阶等比数列;
(3)已知
,令
的前
项和为
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22e75bf99dcb0fe32f66fa90a74f9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc06ff2f65c456efb6a114e67b62cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d16e3ca4fb65342b0e9a0594d661ba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf623a6dd661f87cf64ea150072fd78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcbdf91bb5a49f293f9b52ac8dcfa35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc2b6b23da3e065820c15cf6c675e20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce1ca0ac3789432a3d1ce975a9a6f4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ab5abd104649f9a3c231df9a55813a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce1ca0ac3789432a3d1ce975a9a6f4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69c653f3a05dd25f6affdba7baeab38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0606df3b6fbc6fcf863f9c59e0e54f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc2b6b23da3e065820c15cf6c675e20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab214e5f34d976717284bed52c645e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020e796a0144ff9b3329c7064a01c5c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.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/56a4b318fa151fab14b3857942ed3cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07418f1fa0f6569b50944b5a13ffa021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b00f4eb7f1bd2ccefbabf0c1dfa8f69.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7778648d93a10ed66ddd99672d3ff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a77316e06c00a9086be642f7f590684.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/a2a5a414f3f5d724058a2e887f3d1c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3fec47d2dd2b8099d86c87b6e57de8.png)
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7日内更新
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459次组卷
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3卷引用:云南省大理市2023-2024学年高二下学期6月质量检测数学试题
2 . 设
,
,
为数列
的前
项和,令
,
,
.
(1)若
,求数列
的前
项和
;
(2)求证:对
,方程
在
上有且仅有一个根;
(3)求证:对
,由(2)中
构成的数列
满足
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4bd34c43fac73d8e57bc4002f85e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90563200461ab26934233cd61865e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52c9237cb0b4acc568d4afb12997186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c68a6521ef0a09c3037d2da838e95a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6d8e87ca6ba04d20ede3136fad5e53.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f714d41279567d6b920d3b85d9ded9aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(2)求证:对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d12d0bd9afdd4e53ff37f5bfcaa1106c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6200ccb3851c37c8b3d55876ae2b2fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b388148147e0888b0bcf9b7b9c3f96d.png)
(3)求证:对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790cebd63e23fad615e39f4277f892f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24ec1d0b63b66fcd48bf05eb5a25565.png)
您最近一年使用:0次
3 . 某商场拟在周末进行促销活动,为吸引消费者,特别推出“玩游戏,送礼券”的活动,游戏规则如下:该游戏进行10轮,若在10轮游戏中,参与者获胜5次就送2000元礼券,并且游戏结束:否则继续游戏,直至10轮结束.已知该游戏第一次获胜的概率是
,若上一次获胜则下一次获胜的概率也是
,若上一次失败则下一次成功的概率是
.记消费者甲第
次获胜的概率为
,数列
的前
项和
,且
的实际意义为前
次游戏中平均获胜的次数.
(1)求消费者甲第2次获胜的概率
;
(2)证明:
为等比数列;并估计要获得礼券,平均至少要玩几轮游戏才可能获奖.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffb021aa7d5a5c2f0691e337caad624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/960b682f983b053dc9064cf29c97e250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0c67506bfdded2b8aeff3b60d9c788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)求消费者甲第2次获胜的概率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50ff17a82cafb5d0ee8e5dc6f4e36802.png)
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2023-10-13更新
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1515次组卷
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9卷引用:黄金卷04
(已下线)黄金卷04广东省广州市天河区2024届高三上学期普通高中毕业班综合测试(一)数学试题(已下线)山东省实验中学2024届高三第一次诊断考试数学试题变式题19-22广东省广州市第六十五中学2024届高三上学期11月月考数学试题(已下线)考点19 概率中的数列 2024届高考数学考点总动员(已下线)大招3 概率结合数列模型(已下线)专题05 数列在高中数学其他模块的应用(九大题型+过关检测专训)-2023-2024学年高二数学《重难点题型·高分突破》(人教A版2019选择性必修第二册)湖南省长郡中学2023-2024学年高二下学期寒假检测(开学考试)数学试题(已下线)专题3.5马尔科夫链模型(强化训练)-2023-2024学年高二数学下学期重难点突破及混淆易错规避(人教A版2019)
4 . 材料一:有理数都能表示成
,(
,且
,s与t互质)的形式,进而有理数集可以表示为{
且
,s与t互质}.
材料二:我们知道.当
时,可以用一次多项式近似表达指数函数,即
;为提高精确度.可以用更高次的多项式逼近指数函数.
设
对等式两边求导,
得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fff2ffb69cbf301c9efca778fa2636.png)
对比各项系数,可得:
,
,
,…,
;
所以
,取
,有
,
代回原式:
.
材料三:对于公比为
的等比数列
,当
时,数列
的前n项和
.
阅读上述材料,完成以下两个问题:
(1)证明:无限循环小数3.7为有理数;
(2)用反证法证明:e为无理数(e=2.7182^为自然对数底数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/537c64844b32a708d299ff92dc53c747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0948ca0227d20b76a27cd1a6d65527fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823ab696d27d40920c39b8c910789380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00957293044aadf33411d25f96a33922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823ab696d27d40920c39b8c910789380.png)
材料二:我们知道.当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba156ab181b28fa42e7e4596e69c4d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f0237baa1472e643b6654cd8efe601.png)
设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860870ed643c19574d5d8b3a01b6afca.png)
得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fff2ffb69cbf301c9efca778fa2636.png)
对比各项系数,可得:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a819b1551fee7d49f197b6c7db77a495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93dfb46889c0485f74277e329d8c5ec8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233ede8e2b7ddd6807e67d974b7370ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8feaae3fe8a0a3504ce8f2daee1d0a50.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51190247f6103b03b31a4f6f01420ddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7717db429760899f23de4d22702543.png)
代回原式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b4da092e325d22a89c38348dd5bae89.png)
材料三:对于公比为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6520ff48dba646ba8b7a7d7ae7ca35bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a107eb946e0fe41629c644b7628d5cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ecdb961754406f92fceddd4f77cfd3.png)
阅读上述材料,完成以下两个问题:
(1)证明:无限循环小数3.7为有理数;
(2)用反证法证明:e为无理数(e=2.7182^为自然对数底数).
您最近一年使用:0次