逆・裏・対偶【超わかる！高校数学Ⅰ・a】～授業～論理と集合＃１８
Synopsis
逆・裏・対偶のポイントは！ ・命題 p ⇒ q に対して 【1】矢印の向きを逆にしたものを「逆」 【2】条件を否定したものを「裏」 ...
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