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Corrigé du devoir à la maison n 2 - Lionel Ponton

Corrigé du devoir à la maison n. ?. 2. Exercice 1. 1. Soit n ? N. Alors, un+1 = (n + 1)3 ? 2(n + 1)2 + (n + 1) ? 1. = n3 + 3n2 + 3n + 1 ? 2(n2 + 2n + 1) + ...

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