Washington Ramos
02/20/2023 · Junior High School
montrer que la proposition est une lai logique \[ [P \Rightarrow Q \mid \text { et }[Q \Rightarrow \mathbb{R}] \Leftrightarrow[P \text { con } Q \mid \Rightarrow R] \]
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Pour montrer que la proposition
\[
[P \Rightarrow Q \mid \text{ et } [Q \Rightarrow R] \Leftrightarrow [P \land Q \Rightarrow R]
\]
est une loi logique, on construit une table de vérité et constate que les colonnes \( P \Rightarrow Q \land Q \Rightarrow R \) et \( P \land Q \Rightarrow R \) ont les mêmes valeurs de vérité pour toutes les combinaisons de \( P \), \( Q \), et \( R \).
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