LOGARITHME Propriétés et équations

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L’objectif de cette vidéo est de parcourir les propriétés de la fonction logarithme et donc de mieux comprendre cette fonction. • On découvre ces propriétés au sein d’un exercice très classique en classe de terminale : résoudre des équations. • Ces équations permettent d’insister sur l’importance de déterminer l’ensemble de définition d’une expression contenant des logarithmes avant de commencer tout exercice. • • Principales questions et techniques abordées : • • Ensemble de définition ou domaine d’étude d’une équation contenant des logarithmes. • • Ensemble de définition de la fonction logarithme. • • Propriétés de la fonction logarithme. • • Ecrire une expression avec uniquement « un seul logarithme ». • • S’assurer que les solutions appartiennent à l’ensemble de définition 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