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Q5. [6 points] Pour chaque entier k 2 1, soit ak = V2k + 3 - V2k + 1. a) Considerons la suite {ax}is, =

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Q5. [6 points] Pour chaque entier k 2 1, soit ak = V2k + 3 - V2k + 1. a) Considerons la suite {ax}is, = ( v2k + 3 - v2k + 1. La suite ci-dessous est-elle convergente ou divergente? Si elle est converge, trouver sa limite. Mon- trer tout votre travail et justifier votre reponse. Assurez-vous d'utiliser la notation mathematique approprice. b) Considerons la serie telescopicque Jax = > (v2* + 3 - v2k + 1) k=1 k=1 Trouvez une expression simplifice pour la somme partielle S, en supprimant les termes de maniere telescopicue. Montrez tout votre travail! DO c) Determiner si la serie ) "ax converge ou diverge. Si elle converge, trouver la somme; sinon, expliquez k=1 brievement pourquoi elle diverge

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