解题方法
1 . 设集合
,
,其中
、
、
、
、
是五个不同的正整数,且
,已知
,
,
中所有元素之和是246,请写出所有满足条件的集合A.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1752a1d13ec6a233405fce4d5af61d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1528505335251176f38b9b18ac3c23ae.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/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1ccce8225324817b0577551956464f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b75b2ae211cdb5bccce33a4651fe55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b038d978d61e24a43815834d9ba32396.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
您最近一年使用:0次
名校
2 . 符号
表示不大于
的最大整数(
),例如:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a212231665fde06fb4af99dbaf9f0844.png)
(1)已知
,分别求两方程的解集
;
(2)设方程
的解集为
,集合
,若
,求
的取值范围.
(3)在(2)的条件下,集合
,是否存在实数
,
,若存在,请求出实数
的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a212231665fde06fb4af99dbaf9f0844.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2697d96da1f5c9a017d408a1b04062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
(2)设方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1b23da03ffc7da8607d5ee9b8687f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86eab6bdaf9c7c16d751479532843210.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95321d0e551daa25104d32157249c23d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)在(2)的条件下,集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ff1b43b6a6e375111012b49d5ed25d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f569c191a60a39899b5056aaa74b9f5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2019-10-03更新
|
881次组卷
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6卷引用:上海市川沙中学2017-2018学年高一上学期期中考试数学试题
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