Injectivité

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Je vous explique et vous définis formellement la notion d'injectivité de fonction. Ensuite je vous propose une méthode simple pour aborder les exercices consistant à démontrer l'injectivité. • SYNOPSIS : • I. Injectivité : définition patate. • II. Quatre définition mathématiques équivalentes de l'injectivité. • III. Deux exemples pour montrer l'injectivité de fonctions. • IV. Deux exemples abstraits impliquant l'injectivité. • V. Conseils. • Niveau : BAC+1. • 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