对于正整数集合
(
,
),如果去掉其中任意一个元素
(
)之后,剩余的所有元素组成的集合都能分为两个交集为空集的集合,且这两个集合的所有元素之和相等,就称集合
为“和谐集”.
(Ⅰ)判断集合
是否是“和谐集”(不必写过程);
(Ⅱ)求证:若集合
是“和谐集”,则集合
中元素个数为奇数;
(Ⅲ)若集合
是“和谐集”,求集合
中元素个数的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e53e63811f83121eba1ca9efb17515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a272adba0f1120109824440f0e252c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b0e3b00fe47801afb53ec56706c21a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(Ⅰ)判断集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29577e558c82e3121c9ba2bb2fea875b.png)
(Ⅱ)求证:若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(Ⅲ)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
2021高三·北京·专题练习 查看更多[2]
更新时间:2021-03-19 13:12:24
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相似题推荐
解答题-问答题
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适中
(0.65)
名校
【推荐1】已知二次函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1bd0587f5d6a3b5db9e4a93e0dbc0ef.png)
的图象与
轴有两个不同的交点,若
且
时,
,
(1)证明:
是
的一个根;
(2)试比较
与
的大小;
(3)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1bd0587f5d6a3b5db9e4a93e0dbc0ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf8197e4f3fd18815045d29c357a863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52060e238cf1e17a8101f2c47121c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfcdd49e3b1e34d8cbc870d9ee8a3d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2c70fcaa661df4fbcad820b439accda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3047d4ab078dafc06c047bcbf0a6ffaf.png)
(2)试比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2c70fcaa661df4fbcad820b439accda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f14714599c403e4e8a92196fcd2e4ee3.png)
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【推荐1】已知
,
.设
,并记
.
(1)若
,
,求集合
;
(2)若
,试求
的值,使得集合
恰有两个元素;
(3)若集合
恰有三个元素,且
对于任意的
都成立,其中
为不大于7的正整数,求
的所有可能值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66035108d599053e19a3f25df5cdd849.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad21a60a6d344051da32420d54d09d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e4892080a918aa2127c09e8d4c28c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3588b4eb92c13d23dbc208b560a815ee.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27bf7902f33d26c6ceec085f886ab60d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/590e165e407098fcac9f871beb047dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4edb1714c9e1e5739efd858710c53bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(3)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87da718e24e7f6f0ef5fadb2da96057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4613271f782a90ab580131d09d03d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
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解答题-问答题
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适中
(0.65)
【推荐2】设M、P是两个非空集合,定义M与P的差集为
且
.
(1)若
,
,求差集
;
(2)若
,求出一个集合B,使其满足
;
(3)请从问题(1)或(2)中选出一组集合
,计算
,在此基础上写出集合
的交集、并集或补集的运算表达式,使其结果与
相等,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/540ae2be2417014d7cecdfea006295cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450c12c5b477024d9daba4ccf36ca7f5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8da329f5acfbf2a3cce1b2d0379aa70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f7fe1dbcf1d830ae4163cd289c278c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9e460c144f7a2141d2df0308b125f2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe13c09057c3b823ec0bf6830dde16f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787d7e5bf3da5683beed6ab61110967f.png)
(3)请从问题(1)或(2)中选出一组集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41604a15c2ec813ad37bd0a9bfa33136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41604a15c2ec813ad37bd0a9bfa33136.png)
您最近一年使用:0次