mariaaaaa Posted January 13, 2018 Posted January 13, 2018 Hello, Je ne comprends pas pourquoi l'item "Pour tout x € IR ", ln(x^3 + 1)^2 = 2ln(x^3+1)" est faux. Si qqun pouvait m'expliquer ce serait trop cool! Merci d'avance Quote
Solution La_Reine_Rouge Posted January 13, 2018 Solution Posted January 13, 2018 Bonjour, Si x < 0, ton calcul est impossible car tu aurais du négatif dans le ln (et l'item te dit quelque soit x de R) Bonne journée ! Quote
mariaaaaa Posted January 13, 2018 Author Posted January 13, 2018 Super. Merci beaucoup. Toi aussi Quote
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