已知集合
(
,
)具有性质
:对任意的
、
(
),
与
两数中至少有一个属于
.
(1)分别判断集合
与
是否具有性质
,并说明理由;
(2)证明:若集合
具有性质
,则
且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/027268ee20f5fe6e4397baa0ff3e2b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77b4a47672279cfe36886093807cbce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/31ae331839bce8f3c14d7efd7f9d8915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f52783e7a39f438adf08ef7d05d8c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf9fc9e8c9940547678ff7934363f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)分别判断集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/997bbd93dff19a5dba79bcd9d92f3129.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13470c4e9665748fdd20d0b181abc8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)证明:若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c6f3f23187ea197be1e51d538e2cde.png)
更新时间:2022-11-30 11:55:38
|
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解答题-问答题
|
较难
(0.4)
名校
【推荐1】对于一个非空集合A,如果集合D满足如下四个条件:①
;②
,
;③
,若
且
,则
;④
,若
且
,则
,则称集合D为A的一个偏序关系.
(1)设
,判断集合
是不是集合A的偏序关系,请你写出一个含有4个元素且是集合A的偏序关系的集合D;
(2)证明:
是实数集R的一个偏序关系:
(3)设E为集合A的一个偏序关系,
.若存在
,使得
,
,且
,若
,
,一定有
,则称c是a和b的交,记为
.证明:对A中的两个给定元素a,b,若
存在,则一定唯一.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ff092e72c0b8af0ec11ea1e16c20c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c20ff64cc48dd0907b3f86c2f72ed4fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802a18618d983265b240d352e98010d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c87ad49613978a306ab1c000c84f7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fac2c1aab61d5d6b6d1ebacf76df4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04263219b135885a77d0b95ff5ae8e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b443c138c481dfd65c9f6e003d087b17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fac2c1aab61d5d6b6d1ebacf76df4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55303eac47b7521d66c984919ef73245.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecf5892f45e01accf16c028f1496604.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbefb4190e6d31cf43ce5258ebf325c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4b90a63a63e136b98a6061d703c281.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6919731148cf9c61e492ecd22944897b.png)
(3)设E为集合A的一个偏序关系,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e35231b964e293122c4383dac2431b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac385ec112e6d61b90d953e3f106ee85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c0547c0182518c13ce84342425a4c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/893e925c95774708b58f8be28702284c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/452f5111086abcdf21884aac981a260e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc050f06a69d0a74c28484d3d99f8f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b95219d991157bb0de786036d581b15.png)
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解答题-问答题
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【推荐2】已知
是满足下列条件的集合:①
;②若
,则
;③若
且
,则
.
(1)判断
是否正确,说明理由;
(2)证明:若
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f17b77451caf220bd4808446c5c79e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9661053f3ef4cfa926e5d5fd5c6555f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f0e9c04402a0ffdaa25c3e3c82c7dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8ac8248bb70f9ef5b0cb7d025e05160.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de68508dc0a95fc4b5de772390260db.png)
(2)证明:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9661053f3ef4cfa926e5d5fd5c6555f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f06a4a9deb51418c20e7e7376cc807.png)
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【推荐1】已知数列A:
,
,⋯,
,⋯,满足
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ec497a558b6ac368b4b873663e09ca.png)
,数列A的前
项和记为
.
(1)写出
的值;
(2)若
,求
的值;
(3)是否存在数列A,使得
?如果存在,写出此时
的值;如果不存在,说明理由.
![](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/96abfe2da27a63e6affb19a0c80236d9.png)
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(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5268e7897efdd5bda34a963098349c4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27182444d3da4003680f07ec299087c.png)
(3)是否存在数列A,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438ee118da69b2ccdf7799e69c42079a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce88126c3cbc88e03d38f56b7da315b6.png)
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解答题-证明题
|
较难
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解题方法
【推荐2】若实数列
满足
,有
,称数列
为“
数列”.
(1)判断
是否为“
数列”,并说明理由;
(2)若数列
为“
数列”,证明:对于任意正整数
,且
,都有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce97bb4c969108ebef4ebadd5acc5ca4.png)
(3)已知数列
为“
数列”,且
.令
,其中
表示
中的较大者.证明:
,都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08fee3639b8e3ff9717f3ffd9633927f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f1bc95528c774ce919f7c5a0ef0d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
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(3)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
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