Bonjour,
2) Sn+1 = Un+1 + Vn+1
= 4/5Un + 3/10Vn + 1/5Un + 7/10Vn
= 5/5Un + 10/10Vn
= Un + Vn
= Sn
donc vrai : (Sn) suite constante
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Bonjour,
2) Sn+1 = Un+1 + Vn+1
= 4/5Un + 3/10Vn + 1/5Un + 7/10Vn
= 5/5Un + 10/10Vn
= Un + Vn
= Sn
donc vrai : (Sn) suite constante