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Calculer u1 et u2 pour la suite définie par u0 = 2 et un+1 = (3un + 1)/(un + 2).

Mathematics

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Voici la solution détaillée de l'exercice.

1) Calculer u1u_1 et u2u_2.
La suite est définie par u0=2u_0 = 2 et un+1=3un+1un+2u_{n+1} = \frac{3u_n + 1}{u_n + 2}.

Pour u1u_1, on prend n=0n=0:

u1=3u0+1u0+2=3(2)+12+2=6+14=74u_1 = \frac{3u_0 + 1}{u_0 + 2} = \frac{3(2) + 1}{2 + 2} = \frac{6 + 1}{4} = \frac{7}{4}

Pour u2u_2, on prend n=1n=1:

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