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20 10 4 3 3 -10 -5 4 3 10 3 10 -20- -30 Graphe de y = f (x) Laquelle/lesquelles des enonces concernant f
20 10 4 3 3 -10 -5 4 3 10 3 10 -20- -30 Graphe de y = f (x) Laquelle/lesquelles des enonces concernant f est/sont vraie(s)? (1) f est croissante sur les intervalles (-oo, -4) U (0, 4) (2) f est decroissante sur les intervalles (-co, -4) U (0, 4) (3) f est convexe sur l'intervalle (-4/3 (3, 4/3 3) (4) f est concave sur l'intervalle (-4/3 3, 4/3 (3) (5) Les points critiques de f sont x = -4, x = 0 et x = 4 (6) Les points d'inflexion de f sont x = -4, x = 0 et x = 4
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