论文部分内容阅读
在初中数学中学习了命题以及四种命题的关系,所涉及的命题都是简单命题。本文研究的是复合命题。一用“且”、“或”、“如果”等逻辑语言的形式连接起来的命题叫复合命题。设A、B为两个命题,则A、B可视作两个集合。显然,复合命题A且B等价于A∩B;复合命题A或B等价于A∪B;命
In the junior high school mathematics, the propositions and the relationships between the four propositions are studied. The propositions involved are simple propositions. This article deals with compound propositions. A proposition that is connected in the form of “and”, “or”, “if” and other logical languages is a compound proposition. Let A, B be two propositions, then A, B can be considered as two sets. Obviously, the compound proposition A and B are equivalent to A∩B; the compound proposition A or B is equivalent to A∪B;