1 . 集合论在离散数学中有着非常重要的地位.对于非空集合
和
,定义和集
,用符号
表示和集
内的元素个数.
(1)已知集合
,
,
,若
,求
的值;
(2)记集合
,
,
,
为
中所有元素之和,
,求证:
;
(3)若
与
都是由
个整数构成的集合,且
,证明:若按一定顺序排列,集合
与
中的元素是两个公差相等的等差数列.
![](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/88c7a43079a55f6a53b1307b2b04b55e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cf60f60fedb84bb62a0c00276908ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce69cd33d105ce280170f0cd0513026.png)
(1)已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed0081de4e04574dd0884c4e6077fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d651573ff643d295dcceafdb6f1249d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42500dfa5011086d43ef7e6dac58271.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b27c12cad9040ae9698895e43903747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)记集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c9e547b17582b99e548037172eeff3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f7f9dc32fa86d097de2b7d78b6b487.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/594e60168219fdebb98b45493de0128a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc31dcdb99754fc452ff2b92a2fb8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc9ec58912d76aabf278faa7bf06e45.png)
(3)若
![](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/ef96e432405a1037b5aea7514715e52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa740177330d445b0d506f3b53f9ad2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
您最近一年使用:0次
解题方法
2 . 设等差数列
的前n项和为
,已知
,且
是
与
的等差中项.
(1)求
的值;
(2)若集合
中最小的元素为6,求实数t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77da62187cd8ade4d7b5733c5f3a4a76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f30f56664446f32dbbc2c5f12a99374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7da2f386b78cdf6489efaa2f5820d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc858b7a95c5006a44067022da09f667.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
(2)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/918ed33f1ef912d18ac82d7e84e1d8ed.png)
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2023-04-25更新
|
420次组卷
|
2卷引用:海南省海口中学2023届高三全真模拟考试数学试题
解题方法
3 . 已知集合
.对集合A中的任意元素
,定义
,当正整数
时,定义
(约定
).
(1)若
,求
和
;
(2)若
满足
且
,求
的所有可能结果;
(3)是否存在正整数n使得对任意
都有
?若存在,求出n的所有取值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a02b715c992f112de2f9987c70a3df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af8284494c4f58fa852984085b35603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f3591879d4bacc70989aca85be2efa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12c54046ad997789682be07a1d47a3a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f88776c6c89617192c501dc7f5c9b46.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d64954772ca230b54f1072dc05fd1f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5977a625005a82318474380d6ede73e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df70ecf992ea644da971fe695ca36aa2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af8284494c4f58fa852984085b35603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b792bda20ea741c2507be50668572260.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43354369f1a232b2bcb18fffbc00b989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)是否存在正整数n使得对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/733699269e98fab0eee3b98e95a7072a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd8bb7f8f7baedbe05c4a6c05f0b9e6d.png)
您最近一年使用:0次
2022-05-17更新
|
1503次组卷
|
4卷引用:北京市朝阳区2022届高三二模数学试题
解题方法
4 . 在①
,②函数
的图象经过点
,③
,
这三个条件中任选一个,补充在下面的问题中并解答.
问题:已知集合
,
,且_________,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6b9842cc2d795a2f6e256c105fedeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda9ebeb6e342ab0220edfa240278015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b6a8f5d32391a7c5f11fad20819af1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529b73c7925211751f98b88075d8d209.png)
问题:已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5243c9d15cc89baa47e6a04ac1b2f1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d51b8a2822d21e31369777fad0678b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81919684bc4047d376c7e57dc6c8f1c.png)
您最近一年使用:0次
2020-12-21更新
|
667次组卷
|
8卷引用:山东省全省大联考2020-2021学年高一上学期模拟选课走班调考数学试题
5 . 已知集合
,且
.
(1)求a;
(2)写出集合A的所有子集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a815d2dc4693f13ab83254d457b33eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69ffc521281e9158bfdf9b101c772934.png)
(1)求a;
(2)写出集合A的所有子集.
您最近一年使用:0次
6 . 已知关于
的不等式
的解集为
.
(1)当
时,求集合
;
(2)当
且
时,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce65182cad1364b798d964ab68b51912.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fefe237385a2dc1b005d8dc61ef56eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1a7a50991accfdeed8792884bde953.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-03-15更新
|
714次组卷
|
4卷引用:2020届海南省全国大联考高三第三次联考数学试题
2020届海南省全国大联考高三第三次联考数学试题2020届全国大联考高三第三次联考数学试题河南省信阳市2020-2021学年第一学期高二期中教学质量检测数学(文科)试题(已下线)课时01 集合及其表示法-2022年高考数学一轮复习小题多维练(上海专用)
2019·河北·模拟预测
7 . 已知集合
若A中至多有一个元素,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4bae50aaaf046c48c203b3a937e486e.png)
您最近一年使用:0次
2019·河北·模拟预测
8 . 已知集合
,若A中至多只有一个元素,则a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a7a4b8ddf06d8277e615c6aa36f64d.png)
您最近一年使用:0次