解题方法
1 . 对于非空有限整数集X,
,定义
,对
现有两个非空有限整数集A,B,已知
且
.
(1)当
时求集合B;
(2)证明:
;
(3)当
且
时,任取
构造函数
问:当a,b取何值时,
的最小值最小?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f6b18b109a656b62fb173680ae99ca7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9451ce4fed053674ea20d5b455b783d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb70a272d3abd0bb156e332e75dc36b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43cd3b18a04c9a72a0bf7791bdf56a67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c9a194c0b9152e11aabc059c8483b93.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba387b457949fde336790c9d05c4f1c.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15d281a85375fcf633d2cd86e294028.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eeee50bc500aad281fbb28d465db5b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4a0f5fcd7882200fa25b6ee5143f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c41c277675b413bbff28387082c9785.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbad171aea431ed7347bcdc7fbef54d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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2023高三·全国·专题练习
名校
2 . 已知由实数组成的数组
满足下面两个条件:
①
;②
.
(1)当
时,求
,
的值;
(2)当
时,求证
;
(3)设
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0766a9dd0058b52abd9ad17ddb04fc2c.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8126d64e2becb117d8d42af22a5919b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c12927cb41f08b3fd18f338623db8d8d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24819c61a0a42291903e3c2f5e1c6e41.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7310dc844ccb33e0ff0b62aeb47b8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/818dfdff56f53b3ecfb1096a692e914d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb74763554fd459d736ed9c7b387e01.png)
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3 . 给定有穷数列
、
、
、
,定义数列
的绝对差分数列
、
、
、
,其中
.若数列
是单调不减的,即
,则称数列
是
数列.
(1)直接写出下面两个数列的绝对差分数列,并判断其是否为
数列:
①
、
、
、
;
②
、
、
、
;
(2)已知各项均为整数的
数列
、
、
、
满足
,并且其差分数列是等差数列,若
,
,求
的所有可能值;
(3)已知
数列
、
、
、
是
、
、
、
、
的一个排列,若其差分数列
、
、
、
满足
,求
的所有可能值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a63f1709c28f68d64d9ea1134d68ffb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5453ec6a9e8b96357c888ea863ddcf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b7e51b9389c91feffd0efc3c56dd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bd827a079b9c5f4816d6f025bee8cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa9048c747a4a07468a44167e78c9c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5894ed1f1641a511005398971c26496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b7e51b9389c91feffd0efc3c56dd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca61822f7dd849a5ec4708a87aea8d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19354ba989f4d21ccdafc4b4a4d7eea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c6b1d7902e080f145a094c28856457.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c4b9c60fdb001f63be75985dce0615.png)
(1)直接写出下面两个数列的绝对差分数列,并判断其是否为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c4b9c60fdb001f63be75985dce0615.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2cf5a78fa929cd4c9fa72191f97dd23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9880952857950577055578875ab29141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87d696d9bf311bddb74b915fb3e9506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bff990c7925edc33ee124c18f0e3ddb.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2455a48d59843042ff8150a3b8548cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17ca1e04c68f59bddc675411a0ea2fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b61dd0bd398e182e636d519102aacc2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8578ad77f9f7fb2159f6a6e53bf2ff68.png)
(2)已知各项均为整数的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c4b9c60fdb001f63be75985dce0615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a63f1709c28f68d64d9ea1134d68ffb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5453ec6a9e8b96357c888ea863ddcf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b7e51b9389c91feffd0efc3c56dd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a404bdf74c39673c894fd538f726801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f365ccab332ab4106a3fb8c6a07d618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73028194476dd7ed6f5e2dd150d99254.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e48aa620084408ae9fd4470aa656d67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a404bdf74c39673c894fd538f726801.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c4b9c60fdb001f63be75985dce0615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a63f1709c28f68d64d9ea1134d68ffb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5453ec6a9e8b96357c888ea863ddcf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b7e51b9389c91feffd0efc3c56dd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414656636a840bbb9a031d6103239fdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9880952857950577055578875ab29141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25b2bbf7e0d8ad8306348d9057671f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b7e51b9389c91feffd0efc3c56dd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f8d8c10b4f80f728744bbe722b68e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa9048c747a4a07468a44167e78c9c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5894ed1f1641a511005398971c26496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b7e51b9389c91feffd0efc3c56dd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/182fb5c8bb9bc9768c8e72e5414f4e7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dba9d7201a345787d1b9cb58596664f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
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2022-10-20更新
|
337次组卷
|
2卷引用:北京大兴精华学校2023届高三上学期12月月考数学试题
4 . 给定正整数m,数列
,且
.对数列A进行T操作,得到数列
.
(1)若
,
,
,
,求数列
;
(2)若m为偶数,
,且
,求数列
各项和的最大值;
(3)若m为奇数,探索“数列
为常数列”的充要条件,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee00267997ecd957562fe62214153ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e972bd6405268bcb111d97039df7c5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8743cb652671f7a19a5c9aca1c65a43.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711b21672fd907c5c92fee1d649e7003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced4e381e8c3336848b8c436dbc584f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc250de2317c83a904f0ebce5fc2989.png)
(2)若m为偶数,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d14ae78ff7bc3ecb1735171cdeda7f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21548fbce5a8c4385975335a66401bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc250de2317c83a904f0ebce5fc2989.png)
(3)若m为奇数,探索“数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc250de2317c83a904f0ebce5fc2989.png)
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2022-06-02更新
|
1227次组卷
|
8卷引用:北京市大兴区兴华中学2022届高三三模数学试题
北京市大兴区兴华中学2022届高三三模数学试题北京市第十二中学2022届高三第三次模拟练习数学试题 (已下线)2022年新高考北京数学高考真题变式题13-15题北京市第十二中学2022届高三下学期第三次模拟练习数学试题(已下线)2022年新高考北京数学高考真题变式题19-21题北京市对外经济贸易大学附属中学2023届高三上学期12月月考期末综合测试(一)数学试题北京市日坛中学2023届高三上学期12月月考数学试题(已下线)模块九 数列-2
解题方法
5 . 设
为正整数,如果表达式
同时满足下列性质,则称之为“交错和”.①
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a717d685be4e0d53456f42e3cd401b.png)
;②
;③当
时,
(
);④规定:当
时,
也是“交错和”.
(1)请将7和10表示为“交错和”;
(2)若正整数
可以表示为“交错和”
,求证:
;
(3)对于任意正整数
,判断
一共有几种“交错和”的表示方法,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c978be3cef71aa05b6ca98efb795dc99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d70259b8ecc56afb8b3b15cf46082e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a717d685be4e0d53456f42e3cd401b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9b03740b24965e7196cbe91b82b252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e55143c8153a818863a3e5cf3cc6075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c972cbd63decec197aec1bdc306de67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a4cf5a951eef42eb9dff075e71210f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43649a490b881e3f7a5b6b7bee1a8b8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59295942629ce535281d5066f14a65de.png)
(1)请将7和10表示为“交错和”;
(2)若正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c978be3cef71aa05b6ca98efb795dc99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7306bacb80799eeabd3fd46cb8632598.png)
(3)对于任意正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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