定义:给定整数
,如果非空集合满足如下3个条件:①
;②
;③
若
, 则
;则称集合
为“减
集”.
(1)
是否为“减
集”?是否为“减
集”?简要说明理由;
(2)证明:不存在 “减
集”?
(3)是否存在“减
集”?如果存在,求出所有“减
集”;如果不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfc7338b2a8a4a7d06acd6eb1b446564.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b79c9010218563cb4fd0bc9b1202ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520eacf429c406544c48df40a46c1035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/957d41dbe52b49c3a7339e3519a3fe84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45251c3475305d50c946539a1bd6a5f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e5f130f1e3537857a5e4265498e491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
(2)证明:不存在 “减
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(3)是否存在“减
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
更新时间:2021-11-11 15:09:29
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】设集合
,
.记
为同时满足下列条件的集合A的个数:
①
;②若
,则
;③若
,则
.
(1)求
;
(2)求
的解析式(用n表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e41ee1a79cbcbc9f8ed578e78f00236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f31f755edadf66af8cc1f9f8aeda2ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fcec7af3520884b173b29bda6c657a.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c8a4824db78a0f34777372e4cb7ff9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827e0933211772799f65eccd2fbce592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03b29106a25ad924583970b508b984c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f619f2313657e569db8eb2ea8f275138.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32a859898e9905e0524d3a982eb34b6.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fcec7af3520884b173b29bda6c657a.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】已知含有限个元素的集合
是正整数集的子集,且
中至少含有两个元素.若
是由
中的任意两个元素之和构成的集合,则称集合
是集合
的衍生集.
(1)当
时,写出集合
的衍生集
;
(2)若
是由4个正整数构成的集合,求其衍生集
的元素个数的最小值;
(3)判断是否存在5个正整数构成的集合
,使其衍生集
,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4af4744dbbca4fa3ea142e671910edc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(3)判断是否存在5个正整数构成的集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fd5de2ca77c90a27b7d530ebe596ac8.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知集合
是集合
的一个含有9个元素的子集.
(1)当
时,设
,
① 写出方程
的解
;
② 若方程
(
)至少有三组不同的解,写出
的所有可能值;
(2)证明:对于任意的集合
,存在正整数
,使得方程
至少有三个不同的解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fb0b32e902e20e5c1d031018e25783.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238187cd3e6cabc36f7ace3cea125eec.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b5f602dc0afbc0cf8031dbf7cf5ca0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e13a814f8e081078dcf3788177affcd.png)
① 写出方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9021f0886cadf8d9f6f12d50be1d3d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
② 若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12310781722d69ce4905045f980998c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)证明:对于任意的集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12310781722d69ce4905045f980998c.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】已知
.
(1)求证:
;
(2)若
,求证:
和
中至少有一个大于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/849b46dd0949cf05435656449ddb7a9d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd92e7e7285f384dd31abcc58f655de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d2a320b9ff137ce3632296c4b1d79a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f58a60f2bfac8c6f348ffdeb2b81a0fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0aae6e56e3fd8f0a9b0c9c9ab7ac0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】设集合
,集合
,集合
中满足条件 “
”的元素个数记为
.
(1)求
和
的值;
(2)当
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d9c9ad6bf902f15caa5de470deb0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f2d2e3625c38ca195fcbe0fb123648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73aa694655dd25256efa3778fd198cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9612c6c5fd44efd9e1346dfe433118da.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a639d13faa2e8ba41e49cd18fe5c7292.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a8a1f31defb975682c69c42753e02e8.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7961cbe98aac6a5fdee94582c341b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6646ae1a7cabeed166f1dd82773c7a9e.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】设函数
的定义域与函数
的定义域的交集为D,若对任意的
,都有
,则称函数
是集合M的元素.
(1)判断函数
和
是不是集合M中的元素,并说明理由;
(2)设函数
,且
(k,b为常数,且k≠0),试求函数
的解析式;
(3)已知
,
,试求实数a,b应满足的关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/276b142a9d9f0a87425a668dd6501f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e02cab1add26335b3cb43d5b54c7c853.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801d492de7ae12be2bf576f25c4f1ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bff9681471371af6e3d0934caee1004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3c04cfed27843087dd57d1a3ffb384.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57cac663990f61a4a3086c6bea3d51f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a26cbfd351d1af2add79d6315ad31c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5fbe23505899f6ba973a9156400c94.png)
您最近一年使用:0次