解题方法
1 . 定义满足以下两个性质的有穷数列
为
阶“期待数列”:①
;②
.
(1)若等比数列
为4阶“期待数列”,求
的公比;
(2)若等差数列
是
阶“期待数列”(
.k是正整数,求
的通项公式;
(3)记
阶“期待数列”
的前n项和为
(
.k是不小于2的整数),求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d02a8555da4dbbc7820a50a95b071ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3444792802dd088cd0cc323483de189b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa0fca4198a6d5c5b76e5e1716dc4e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4830a6ec5e0ffd7074b854b4ecdc19.png)
(1)若等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394aee19f94c2b70fcce1d69b31dc7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851f68e5082033f024ee2012e6ff598c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5631bc01b998a4b3fabd9e131699dc.png)
![](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/a0a3aa5e30bd2ccac16959d046bb38f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7575a54621b480d9d1e0efa5935d8f47.png)
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2 . 数列
的前
项和为
,
,且对任意的
都有
,则下列三个命题中,所有真命题的序号是( )
①存在实数
,使得
为等差数列;
②存在实数
,使得
为等比数列;
③若存在
使得
,则实数
唯一.
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999ac8c1ef39251e07a7fc54cbf7e26e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194463e3b011603ff59c0789bcb65c40.png)
①存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
②存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
③若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/694b52596fdfcc391b23b3894ad85ec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17bdc46d9f8256161c18158c1f5dc386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.① | B.①② | C.①③ | D.①②③ |
您最近一年使用:0次
2021-05-07更新
|
499次组卷
|
5卷引用:数学-2022年高考押题预测卷02(北京卷)
(已下线)数学-2022年高考押题预测卷02(北京卷)(已下线)课时22 数列、等差数列、等比数列-2022年高考数学一轮复习小题多维练(上海专用)(已下线)课时25 数列新定义-2022年高考数学一轮复习小题多维练(上海专用)上海市浦东新区2021届高三二模数学试题河南省周口市太康县第一高级中学2022-2023学年高二上学期第一次月考数学(文科)试题
3 . 数列
:
,
,
,…,
,…,对于给定的
(
,
),记满足不等式:
(
,
)的
构成的集合为
.
(Ⅰ)若数列
,写出集合
;
(Ⅱ)如果
(
,
)均为相同的单元素集合,求证:数列
,
,…,
,…为等差数列;
(Ⅲ)如果
(
,
)为单元素集合,那么数列
,
,…,
,…还是等差数列吗?如果是等差数列,请给出证明;如果不是等差数列,请给出反例.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544530e1133b2924ccfbe691141a5641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60939f5f5cd85a28dcb63d2f78d26b60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb18547717a019d4b546b8dd0b0365c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/030137376417efb2ac10443ff54fbfb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c0b3d5b60308da39aaf5493d58f444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe779a0f086e93f260a1b0c9be9cc415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2ea3d72f46edfb7216c7bc9ab9cf9a.png)
(Ⅰ)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41c721ebc7a5f8346da3c44af85a047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e612765b49f8cdda75bdaaf4f86edd.png)
(Ⅱ)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2ea3d72f46edfb7216c7bc9ab9cf9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60939f5f5cd85a28dcb63d2f78d26b60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544530e1133b2924ccfbe691141a5641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
(Ⅲ)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2ea3d72f46edfb7216c7bc9ab9cf9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60939f5f5cd85a28dcb63d2f78d26b60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544530e1133b2924ccfbe691141a5641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
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解题方法
4 . 用
表示一个小于或等于
的最大整数.如:
,
,
. 已知实数列
、
、
对于所有非负整数
满足
,其中
是任意一个非零实数.
(Ⅰ)若
,写出
、
、
;
(Ⅱ)若
,求数列
的最小值;
(Ⅲ)证明:存在非负整数
,使得当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3420606c96b68fb884c839923fd20a25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e2f5e82abde22ee1dae0c6d73e32d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d0024c22d248668a379d8dd1b84cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f7dcce39f3d4dc6b7faf84dc1d0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96377872af787cbf0d0d24d1db455f75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f7dcce39f3d4dc6b7faf84dc1d0a1.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47767a5d0f95d7d936aa664e71b52baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd65631a58898fc1919ce8b4892835b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aaf6e3d7a39c0583e58599c05d86f7d.png)
(Ⅲ)证明:存在非负整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52608aa7220d68349e5bc5659072693a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d29f1962d214d7510b868a3a5055e41.png)
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5 . 在无穷数列
中,
,
是给定的正整数,
,
.
若
,
,写出
,
,
的值;
证明:存在
,当
时,数列
中的项呈周期变化;
若
,
的最大公约数是
,证明数列
中必有无穷多项为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a97aa79f9746d819f37958c3f240965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6065aaa8f3f103d1bc960da8318ce35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2693734765399876e9e93cdb110231c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaec3004937aab88c44e66753caab782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a50f815f27b1c935fe28935cb2d3ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90707999e8fc89ae1137e5115c39f637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0c73a1455fc61a2239cb62de1f3c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eae51f0310b87cde2e206643e9d25a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62295c36d2e2174908c2bec0eb5b30f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
6 . 若存在某常数M(或m),对于一切
,都有
(或
),则称数列
的上(或下)界,若数列
既有上界也有下界,则称数列
为“有界”.
(1)已知4个数列的通项公式如下:①
;②
;③
;④
.请写出其中“有界数列”的序号;
(2)若
,判断数列
是否为“有界数列”,说明理由;
(3)在(2)的条件下,记数列
的前n项和为
,是否存在正整数k,使
,都有
成立?若存在,求出k的范围;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5612ce06759d0f77ca029d10083f7d1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63cad0f23354aa754ade482d849557fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(1)已知4个数列的通项公式如下:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc564bcc0eb8c08e939964ab9386ddd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f725db22ca50414f1eb2f52ae319446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32103514089f5575601b19883937d180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9c2972fa305cfaea427d330569269c8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51ca89b5e2017caa331b54e539893f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(3)在(2)的条件下,记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4fef5f2a4235817fb704d29e08766e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/671c36c8b696c5226c77165a5781faf9.png)
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7 . 给定数列
.对
,该数列前
项
的最小值记为
,后
项
的最大值记为
,令
.
(1)设数列
为2,1,6,3,写出
,
,
的值;
(2)设
是等比数列,公比
,且
,证明:
是等比数列;
(3)设
是公差大于0的等差数列,且
,证明:
是等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd7b6f92256833e6b9b849db8d4cca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba10b416ff8ac2e0f12626bacbd0ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e819b87f90651d89fcd258c276294e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851f6c3f42d508d94512d69df452cd3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b0fd5bcec476872b8a331ef4fefa44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdc5c895153932c3e827a464664cef90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731b3972448ca3ec043cb8e2c53199de.png)
(1)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d0252c1b2f7d2a84b5c985d19d547.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d51e5af26c92bc02df6b1e50a2975afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ca664b1e82da6f50064a76fe118aa80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e28d90a99a2afea0d6c0cf0f898c1447.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e28d90a99a2afea0d6c0cf0f898c1447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f0ba65d2ea1d528ed95f8d8cd339d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a7170836b85b2aad29b01f1af0e86d2.png)
您最近一年使用:0次
2020-04-29更新
|
510次组卷
|
4卷引用:专题21 数列的综合应用-2020年高考数学母题题源解密(北京专版)
(已下线)专题21 数列的综合应用-2020年高考数学母题题源解密(北京专版)2020届北京市顺义区高三二模数学试题北京市东北师范大学附属中学朝阳学校2021-2022学年高二6月测试数学试题北京交通大学附属中学2020-2021学年高二下学期期末数学试提
8 . 已知集合
是正整数
的一个排列
,函数
对于
,定义:
,
,称
为
的满意指数.排列
为排列
的生成列;排列
为排列
的母列.
(Ⅰ)当
时,写出排列
的生成列及排列
的母列;
(Ⅱ)证明:若
和
为
中两个不同排列,则它们的生成列也不同;
(Ⅲ)对于
中的排列
,定义变换
:将排列
从左至右第一个满意指数为负数的项调至首项,其它各项顺序不变,得到一个新的排列.证明:一定可以经过有限次变换
将排列
变换为各项满意指数均为非负数的排列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99226f9efa9faf584ff6836c1294b891.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fda57f23706517a3b7c02218a1dbcef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/698084824a9f1fcbf6de7a0c96854365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4b46ff723f7ca1cfd3af8aab24e9402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce0224ab48d68835cfc35244b2bf14e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d55e4f94e9cb1510367c6d831a42c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ea014220aa658c8baa6e1f43e686a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1602c6064af12eed3fd1291f8272d93c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a272adba0f1120109824440f0e252c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e3d172f08313520e76b6cbc2ff9980c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e3d172f08313520e76b6cbc2ff9980c.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c345907ebe27888332b1b44c666cc47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f90060c5c46c86eeab5f6c62515c35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df3f8d3b5b97f81b617d31f7b9dd5fc0.png)
(Ⅱ)证明:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0ddc00de5e13fb0ac69a78951d792a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(Ⅲ)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09757d013574cf058d5bb944fdf034a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09757d013574cf058d5bb944fdf034a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
您最近一年使用:0次
名校
9 . 在一个有穷数列的每相邻两项之间插入这两项的和,形成新的数列,我们把这样的操作称为该数列的一次“Z拓展”.如数列1,2第1次“Z拓展”后得到数列1,3,2,第2次“Z拓展”后得到数列1,4,3,5,2.设数列a,b,c经过第n次“Z拓展”后所得数列的项数记为Pn,所有项的和记为Sn.
(1)求P1,P2;
(2)若Pn≥2020,求n的最小值;
(3)是否存在实数a,b,c,使得数列{Sn}为等比数列?若存在,求a,b,c满足的条件;若不存在,说明理由.
(1)求P1,P2;
(2)若Pn≥2020,求n的最小值;
(3)是否存在实数a,b,c,使得数列{Sn}为等比数列?若存在,求a,b,c满足的条件;若不存在,说明理由.
您最近一年使用:0次
2020-05-11更新
|
486次组卷
|
4卷引用:专题21 数列的综合应用-2020年高考数学母题题源解密(北京专版)
(已下线)专题21 数列的综合应用-2020年高考数学母题题源解密(北京专版)2020届北京市房山区高三第一次模拟考试数学试题北京市育才学校2023-2024学年高三上学期期中测试数学试卷重庆市渝北区、合川区、江北区等七区2019-2020学年高二下学期期末联考数学试题
名校
10 . 已知数列
满足:对任意
,若
,则
,且
,设
,集合
中元素的最小值记为
;集合
,集合
中元素最小值记为
.
(1)对于数列:
,求
,
;
(2)求证:
;
(3)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5897fd42e01b077fe8685e7b7a71e278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfbc054e041fa0b53feb9b81a4608347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b71af6590f0f369c164a054a8b63bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a205f096c854a2f7cd71255056f9f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7aad65e4222bcab9f6ddc94ea495de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f8fdbba79ddbc156bbb300b1b051e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c342a95c3bc9c6ec834337b12bcf8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74fd79d9aa9740d095affe36788e01cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a1493a001b60b0e94e342d428caa.png)
(1)对于数列:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3cf64aad412f59d047c97efa1516175.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c342a95c3bc9c6ec834337b12bcf8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a1493a001b60b0e94e342d428caa.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5aa00523d3ab546ab459d1fff0a6136.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c342a95c3bc9c6ec834337b12bcf8e.png)
您最近一年使用:0次
2020-06-13更新
|
479次组卷
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4卷引用:卷11-【赢在高考·黄金20卷】备战2021高考数学全真模拟卷(北京专用)
(已下线)卷11-【赢在高考·黄金20卷】备战2021高考数学全真模拟卷(北京专用)(已下线)考向29 推理与证明-备战2022年高考数学一轮复习考点微专题(上海专用)2020届上海市七宝中学高三三模数学试题上海市七宝中学2020届高三下学期模拟数学试题