suite arithmético-géométrique

Le but de cet exercice est d'étudier, à l'aide d'une suite auxiliaire, la suite (U n) définie par U 1=5 et U n+1=6U n+15 pour tout entier naturel n ≥1 .

L'exercice est un peu long, il comporte 6 questions et 17 réponses. Ne vous découragez pas !

Question 1/6
Calculer les premiers termes de la suite.
U 1=
U 2=
U 3=

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