设集合
,如果存在
的子集
,
,
同时满足如下三个条件:
①
;
②
,
,
两两交集为空集;
③
,则称集合
具有性质
.
(Ⅰ) 已知集合
,请判断集合
是否具有性质
,并说明理由;
(Ⅱ)设集合
,求证:具有性质
的集合
有无穷多个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/600c7541cb1e9e471f04918cc9786008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d307ec71820b6536453fbdb5069da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8b572950af972d5e265f689e35314c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2eb7d5fb0130ed8d205b43cb1ed3fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cd6746267a246afaf1d464063507d6.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982b037abf6daa6244e780698eaab951.png)
②
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/625bff725b23b22199626c1b435936c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb9ad1e34877b0db02d0219332b0f7b.png)
(Ⅰ) 已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e76011de3a9e84bf9253dfb1aabf7c95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb9ad1e34877b0db02d0219332b0f7b.png)
(Ⅱ)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf9420bb3d442024ab7021058c2a57f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb9ad1e34877b0db02d0219332b0f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49a9bb8b95c37f1d5f434cd03a97e725.png)
更新时间:2020-02-09 09:17:49
|
相似题推荐
解答题-问答题
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较难
(0.4)
真题
【推荐1】对正整数n,记In={1,2,3…,n},Pn={
|m∈In,k∈In}.
(1)求集合P7中元素的个数;
(2)若Pn的子集A中任意两个元素之和不是整数的平方,则称A为“稀疏集”.求n的最大值,使Pn能分成两个不相交的稀疏集的并.
![](https://img.xkw.com/dksih/QBM/2014/5/30/1571743606530048/1571743611781120/STEM/cf6b7c2d6e754573bc83a6fbca8816a0.png)
(1)求集合P7中元素的个数;
(2)若Pn的子集A中任意两个元素之和不是整数的平方,则称A为“稀疏集”.求n的最大值,使Pn能分成两个不相交的稀疏集的并.
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名校
【推荐2】对于任意的
,记集合
,
,若集合A满足下列条件:①
;②
,且
,不存在
,使
,则称A具有性质Ω.如当
时,
,
,
,且
,不存在
,使
,所以
具有性质Ω.
(1)写出集合
,
中的元素个数,并判断
是否具有性质Ω.
(2)证明:不存在A、B具有性质Ω,且
,使
.
(3)若存在A、B具有性质Ω,且
,使
,求n的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6136140ae3eda80fa2251dd6f3840415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d61ab4e28840d2597566a9677cf1670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c8a4824db78a0f34777372e4cb7ff9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac5230b93cc884fe3b8798d0cd2f30e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf5776ec7059c208daf01ca48a34915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b354b577ec9cdb8941ba4f7b66a8aea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ba1217bdce7fed00b4c488ae2d1c83f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1922efd1e913d2721fbf240ea3740ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d64a4f7b1f0fb56b37f75d95a50d321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf5776ec7059c208daf01ca48a34915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b354b577ec9cdb8941ba4f7b66a8aea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
(1)写出集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee50575e3ebd56c4f46dd0bbf8e55d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
(2)证明:不存在A、B具有性质Ω,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea9a4259cca10c1f5af28e621ebafd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef35a92301f139a035fc643ff1545c1.png)
(3)若存在A、B具有性质Ω,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea9a4259cca10c1f5af28e621ebafd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5a347c4b63fad850a75f36e87f44c86.png)
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解答题-问答题
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较难
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【推荐1】给定奇数
,设
是
的数阵.
表示数阵第
行第
列的数,
且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de075cbe45f637a11f53685a018e340a.png)
.定义变换
为“将数阵中第
行和第
列的数都乘以
”,其中
.设
.将
经过
变换得到
,
经过
变换得到
,
,
经过
变换得到
.记数阵
中
的个数为
.
(1)当
时,设
,
,写出
,并求
;
(2)当
时,对给定的数阵
,证明:
是
的倍数;
(3)证明:对给定的数阵
,总存在
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767f5a4746f04db68386fac3970b1ed1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a14c188b1c9d61aa237b137ba18023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/604a3f7f0c00236993c4659ff12fd63c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de075cbe45f637a11f53685a018e340a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f4f7f26c112216d9a548b5ad082ea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca81e328c01121c81869e7d304f01054.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c9bcf77059762fc46fc437ca8b060c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84221a34d3afe2b194c604aa642aa922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b003c008551d85cda4fe287d0742216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd55ae46a41a37f90a3d745b9e8f879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88d6bc8e1dc170db94a6caf502b9b187.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90c0d07535b2eca42f44b8109c6ccd11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbf9bc3b31e16bd645b864a346187f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00442d96d695db2c58bf1fb7165fca94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d13fffd82b0a6b66580a17a6e0d2802.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae537905eee4d73c55298fa4280794b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84406a04370c0c0834550b1f22b49d50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
(3)证明:对给定的数阵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
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解答题-证明题
|
较难
(0.4)
【推荐2】(1)已知
,求证
;
(2)已知
,求证
中至少有一个大于1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aeba3d801bcfbc2b82b82f6972cd487.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a85ae237b135b9d58a42e445040eecf.png)
(2)已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
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