How to show that a function is injective.
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How to show that a function is injective.
Fonction injective ou pas ? Exercice corrigé + définition claire Dans cette vidéo, je corrige un exercice classique sur l'injectivité d'une fonction. On rappelle la définition exacte : une fonction est injective si tout élément de l'ensemble d'arrivée a au plus un antécédent. Je t'explique mot pour mot la définition, puis on applique ...
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