January 2021 0 69 Report
Bonjour, Pour Df on résout :

f(x) = √x² - 2x - 3

Condition : x² - 2x - 3 ≥ 0

J'ai trouvé :

Δ = 16
x1 = 3 ; x2 = -1

Donc, c'est Df = ]-∞ ; -1 ; 3] ?

Est-ce la réponse ?
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