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关于命题,初中教材中把“判断一件事情的句子”叫命题;高中教材中把“可以判断真假的语句”叫命题.虽然叙述有些差异,但两者本质上是一样的.从定义可以知道:一、数学命题及其表示形式.用语言、符号或式子表达的,而且能判断真假的语句叫作数学命题.例1(1)20是5的倍数;(2)邻边相等的平行四边形是菱形;(3)2+3<5.这三个语句都是命题,其中(1)与(2)是真命题,(3)是假命题.
With regard to propositions, in junior high school textbooks, “sentences that judge one thing” are called propositions; in high school textbooks, “statements that can be judged as true and false” are called propositions. Although there are some differences in narratives, the two are essentially the same. From the definition can To know: First, mathematical propositions and their representations. Statements that are expressed in words, symbols, or expressions and that can be used to judge true and false are called mathematical propositions. Example 1 (1) 20 is a multiple of 5; (2) Equilateral neighbors The parallelogram is a diamond; (3) 2+3<5. All three statements are propositions, where (1) and (2) are true propositions, and (3) are false propositions.