1 . 设集合
中的最大元素与最小元素分别为M,N,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e38faaabb5350ab23a42c52d78d38e1b.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a174cf6a04826e10a6d50abc117f9e38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e38faaabb5350ab23a42c52d78d38e1b.png)
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2 . 已知集合
,若集合A中恰有9个正整数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22d7c214d9685da7be80319ed80d8df.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a28163ffc27c4685b444c454eded04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22d7c214d9685da7be80319ed80d8df.png)
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名校
3 . 已知
,集合
,若
,则
的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360ff131c51a4ef6745538c18cec92c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85134c39778acf4a38bdbc76caa19ad1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d0d79fd0efdb59c9ca65bfae4a0861.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
您最近一年使用:0次
2021-07-21更新
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526次组卷
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2卷引用:河南省驻马店市确山县第一高级中学2022-2023学年高二上学期数学竞赛试题