Réponse :
Bonsoir
Explications étape par étape
a) u0 = 2
u1 = u0 + 0² = 2
u2 = u1 + 1² = 2 + 1 = 3
u3 = u2 + 2² = 3 + 4 = 7
u4 = u3 + 3² = 7 + 9 = 16
b) u0 = 2
u1 = -1
u2 = u0×u1 = 2×(-1) = -2
u3 = u1×u2 = (-1)×(-2) = 2
u4 = u2×u3 = (-2)×2 = -4
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Réponse :
Bonsoir
Explications étape par étape
a) u0 = 2
u1 = u0 + 0² = 2
u2 = u1 + 1² = 2 + 1 = 3
u3 = u2 + 2² = 3 + 4 = 7
u4 = u3 + 3² = 7 + 9 = 16
b) u0 = 2
u1 = -1
u2 = u0×u1 = 2×(-1) = -2
u3 = u1×u2 = (-1)×(-2) = 2
u4 = u2×u3 = (-2)×2 = -4