Bradley Carter
07/24/2024 · Senior High School

soit \( f \) la fonction numérique definie par \( \left\{\begin{array}{c}f(x)=\frac{2-\sqrt{x+3}}{x-1} ; x \neq 1 \\ f(1)=\frac{-1}{4}\end{array}\right. \) 1. Déterminer \( D_{f} \) l'ensemble de définition de \( f \). Etudier la continuité de \( f \) en 1 2. Etudier la dérivabilité de \( f \) en 1 3. 4. Déterminer une équation cartésienne de la tangente à \( \left(C_{f}\right) \) au point d'abscisse 1 .

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1. \( D_f = [-3, 1) \cup (1, +\infty) \); \( f \) is continuous at \( x = 1 \). 2. \( f \) is differentiable at \( x = 1 \) and \( f'(1) = 0 \). 3. The equation of the tangent to \( (C_f) \) at the point of abscissa 1 is \( y = -\frac{1}{4} \).

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