[請益] 判斷A∪B={x∣x∈A或x∈B的}'或'字是兼容
各位大大大家好,小弟潛水一陣子
因為我是買林正弘老師的書自學的
習題部分真的想不出來
A∩B⊆A∪B
A⊆A∪B
根據這兩式可判斷A∪B={x∣x∈A或x∈B}的 "或" 字是兼容的意義
請詳述其理由
感謝~
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