已知集合
,其中
.对于
,
,定义
与
之间的距离为
.
(1)记
,写出所有
使得
;
(2)记
,
、
,并且
,求
的最大值;
(3)设
,
中所有不同元素间的距离的最小值为
,记满足条件的集合
的元素个数的最大值为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d9b434ed11c614630ad6a71bf1b196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53422543e9a9311416faf749bdda67b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1a7c3713945abc4eca8485945abf32.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/80ebc8c7e32c1b561a908a36cfa2cbb5.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de36ac74e2640a897dedd876abcb63b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644d2ee36439bbc01fb4f35e9d24e5bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf15320a185c13d59087e9391485612.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d089503d05901e02113c0ed0bd59dff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a3b20462ba83086d0711a25ed83bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8b9dbb9c52862ac974003241d68fb61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3bcb4828b16c8e845492f1a53ddd9a9.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2b280a6a65c9bf2f20cad5d1106080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff60dcf2b1b2484b1ba940af96d336c.png)
2021·北京·模拟预测 查看更多[3]
更新时间:2021-05-30 17:20:15
|
相似题推荐
【推荐1】我们称
元有序实数组
为
维向量,
为该向量的范数,已知
维向量
,其中
,记范数为奇数的
维向量
的个数为
,这
个向量的范数之和为
.
(1)求
和
的值;
(2)求
的值;
(3)当
为偶数时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223ed9652852ca4d996fd1f20808df9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a79b7ec77425af9152ef0cd3dacfe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45981f9cd45bf7b0655d3c9e461fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e894b2a2d6b062551e7d16fce65940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d6439d5087f29dd37b0627182ba5187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b56e44e4f0424a2b7a45567120a2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2857fac4963b129d99e79dcb3e13d295.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de9d5e95ba59043c71849a58cd8d061.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/953e362ec77e9d5a01ea534385d5a8d4.png)
您最近一年使用:0次
【推荐2】(1)在集合A={1,2,3,4,…,9}中,选出三个不同的数字,组成一个三位数,其中能被3整除的三位数有几个?
(2)在集合A={1,2,3,4,…,n}中,选出
个不同的元素,共有x种选法:若选出的元素中含有2,此时的选法总数记为y:若选出的元素中不含有2,则选法总数记为z.求出x,y,z;猜想x,y,z所满足的等量关系并加以证明:
(3)在集合A={1,2,3,4,…,2n}中,任取
个元素构成集合
,当
的所有元素之和为偶数时,记满足条件的集合
的个数为M;当
的所有元素之和为奇数时,记满足条件的集合
的个数为N.求
,并将结果化简.
(2)在集合A={1,2,3,4,…,n}中,选出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d1b3863bd97ea3029aa194b4a5b605.png)
(3)在集合A={1,2,3,4,…,2n}中,任取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f07e5bde80d0b2e8833e1d86027091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c88125cfb884dd1e101c707bf34a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21260b550cf5cb5840c365026dda77ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0d7559d8dfa8236ca9d4b1853fbdec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c88125cfb884dd1e101c707bf34a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0d7559d8dfa8236ca9d4b1853fbdec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5eeaa30850a2dd1abcb46208ac8b6a2.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
解题方法
【推荐1】已知有穷数列A:
(
且
).定义数列A的“伴生数列”B:
,其中
(
),规定
,
.
(1)写出下列数列的“伴生数列”:
①1,2,3,4,5;
②1,
,1,
,1.
(2)已知数列B的“伴生数列”C:
,
,…,
,…,
,且满足
(
,2,…,n).
(i)若数列B中存在相邻两项为1,求证:数列B中的每一项均为1;
(ⅱ)求数列C所有项的和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55aea2d6309205fe59687ea3440bb2e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edfe398651d365506cabd498ee5d1556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860a70d427b4c46206e43f17299e9b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11829c0cd3e74ffdf951e2d484718d9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b740bc48c9718a294c11a1485fd14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/897b606fdc64a88a0938d3d60c3ea3e9.png)
(1)写出下列数列的“伴生数列”:
①1,2,3,4,5;
②1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
(2)已知数列B的“伴生数列”C:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7936359df4c926b72b48c6fdae55f12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76f79be89b8c6227b68eded6b675546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e5dfcc28321b563a8012ec2899c502.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59e7c7a84a4bdb959e95536d0404ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d84a2027dc4157991c40673b6b4d23a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
(i)若数列B中存在相邻两项为1,求证:数列B中的每一项均为1;
(ⅱ)求数列C所有项的和.
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】已知
,
,…,
是由
(
)个整数
,
,…,
按任意次序排列而成的数列,数列
满足
(
),
,
,…,
是
,
,…,
按从大到小的顺序排列而成的数列,记
.
(1)证明:当
为正偶数时,不存在满足
(
)的数列
.
(2)写出
(
),并用含
的式子表示
.
(3)利用
,证明:
及
.(参考:
.)
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6188466f235e4e1ea2e31f2ba7c66fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7304f4a3860fb2ce6535b51166d21446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7936359df4c926b72b48c6fdae55f12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76f79be89b8c6227b68eded6b675546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59e7c7a84a4bdb959e95536d0404ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af09cf76bddbebeb560b2fd6e14c94a5.png)
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc631d51fcb8adfef863d79c7af51098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7304f4a3860fb2ce6535b51166d21446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e5dfcc28321b563a8012ec2899c502.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7304f4a3860fb2ce6535b51166d21446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)利用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/328f89fc3962d57a2c15f91a69945014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6d3b3cda38ccba8ce44630bec332e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b7f6d39982c903373565f3207ddb05c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83a3d41cba73d1ed67352c82556b742b.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐1】设集合
中至少有两个元素,且S,T满足:
①对于任意
,若
,都有
;
②对于任意
,若
,则
.
(1)分别对
和
,求出对应的
;
(2)如果当S中恰有三个元素时,
中恰有4个元素,证明:S中最小的元素是1;
(3)如果S恰有4个元素,求
的元素个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61fa126ff595fe6c0b42a31148d6fd65.png)
①对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c36aecba41f6f5ff0d46a29dccaaf01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11a069688e4c797fcf527eab15afa82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8339eab9c659e50db86828b65f825e22.png)
②对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/566d386cbedb1c8750f4837633c2af64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a5abe56c019ac914e1fcde1865a747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5718e9c8baa106b447f9fae23e730de.png)
(1)分别对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1014d847a76d84feaa69d22f6c27e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a47661e8894db3bc283922eaf4bfa711.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af500a4e28d6f5b38390b7642eb96ed5.png)
(2)如果当S中恰有三个元素时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af500a4e28d6f5b38390b7642eb96ed5.png)
(3)如果S恰有4个元素,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af500a4e28d6f5b38390b7642eb96ed5.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
解题方法
【推荐2】设数集S满足:①任意
,有
﹔②对任意x,
(x,y可以取相同值),有
或
,则称数集S具有性质P.
(1)判断数集
和
是否具有性质P,并说明理由;
(2)若数集
且
具有性质P.
(i)当
时,判断
是否一定构成等差数列,说明理由;
(ⅱ)若
,数集B中的每个元素均为自然数且
,求数集B中所有元素的和的所有可能值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8647b00cc8c8f35555c7d78cf2812c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c8b2714e2f6ddfdd6b05d3b4de1149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b8e5872f45d4b878b0119997cb5bae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84734fbba70c0b45045fabf8090f810b.png)
(1)判断数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e300e8b92758e3f411495dde53d5a904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802bb7e2a3ad9686147591de5e12392b.png)
(2)若数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ddc189d2c675b0e2ade4f7ed40f66fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ef80455ed7f56718cc4f1d8b837b30.png)
(i)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac3649308b528fd56545ba102dc42d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec99c57bf7997bd93e1ed8f48d5af9a.png)
(ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ab800bb4666f21dbe05ec239ca39ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06f73eec2bbbfa166f874c39d05accb6.png)
您最近一年使用:0次
解答题-问答题
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困难
(0.15)
名校
【推荐3】定义:Leistra序列是一个由
,
,…,
,
组成的有限项序列,有如下性质:①每项
,
,…,
,
都是正偶数;②每项
,
,…,
,
通过将序列中的前一项除以一个10-50(包含10和50)之间的整数得到(对于一个特定序列,使用的除数不一定都相同);③10-50(包含10和50)之间没有整数m使得
是一个偶数(其中
为数列的最后一项).
(1)试判断序列1000、100、4和序列1000、200、4是否为Leistra序列?并说明理由;
(2)是否存在以首项
,末项
的Leistra序列?如果有,请写出所有的Leistra序列;如果没有,请说明理由;
(3)首项为
的Leistra序列有多少个?并说明理由.
![](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/a7230de53663c75658c58bbf206a0085.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9240ce2c5ff0d732cc5999c4ea0bdbec.png)
![](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/a7230de53663c75658c58bbf206a0085.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7230de53663c75658c58bbf206a0085.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/551c361e8f96ebad6c4e847b6a7ace8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(1)试判断序列1000、100、4和序列1000、200、4是否为Leistra序列?并说明理由;
(2)是否存在以首项
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/538b20cab34cfd8ded0e861ec315a195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fd15570bcd1cc1228fd3929a7c3f42.png)
(3)首项为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5489378ab0dfd16d9543b20845b91d5.png)
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