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Exercice 5 (3 points) : Determiner l' intervalle de convergence de la serie des puissances suivantes : (x+1) 1=1 3 n (A) [-3, 3[; (B)

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Exercice 5 (3 points) : Determiner l' intervalle de convergence de la serie des puissances suivantes : (x+1)" 1=1 3" n (A) [-3, 3[; (B) ]-3, 3]; (C) [-2, 4[; (D) ]-2, 4]; (E) [-4, 2[; (F) ]-4, 2]. Exercice 6 (3 points) : Soit f(y) = En=o(-1)n (n+1)yn+1 2y2 4y4 = y -+ (2n+1)! 3! 7! +. ... 5! Determiner le coefficient devant x' dans la serie des puissances de F(x) = [" f(12 )dt (A) B (C) (D (E 42 (F) 280 56 1080 1008 24

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