2025年教学资料:1.1.1 集合的概念(分层作业)(解析版)
1.1.1集合的概念分层作业1.下列各组对象中不能组成集合的是( C )A.正定职教中心2023年入校的全体学生B.我国十四届全国人大一次会议的全体参会成员C.中国著名的物理学家D.不等式x-1>0的实数解解 “著名的物理学家”无明确的标准,对于某人是否“著名”无法客观地判断,因此“中国著名的物理学家”不能组成集合,故选C.2..(用符号“”或“”填空)【答案】【分析】根据实数的定义及集合与元素的关系判断即可.【详解】解:.故答案为:.3.已知①;②;③④,其中正确的为(填序号).【答案】①③【分析】由元素与集合的关系直接判断即可.【详解】;;;,故①③正确.故答案为:①③4.设由“我和我的祖...
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