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Louloutte18
@Louloutte18
May 2019
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Bonjour, je suis bloquée pour l’exercice 36..
merci d’avance à la personne qui m’aidera!
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greencalogero
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Bonjour,
Ex36:
1) On part de la relation de l'énoncé:
U(n+1)=U(n)-1/(n+1)
U(n+1)-U(n)=-1/(n+1)
2) Comme on a:
U(n+1)-U(n)=-1/(n+1)
Avec n∈N donc ∀n alors U(n+1)-U(n)≤0 donc la suite U(n) est décroissante.
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Verified answer
Bonjour,Ex36:
1) On part de la relation de l'énoncé:
U(n+1)=U(n)-1/(n+1)
U(n+1)-U(n)=-1/(n+1)
2) Comme on a:
U(n+1)-U(n)=-1/(n+1)
Avec n∈N donc ∀n alors U(n+1)-U(n)≤0 donc la suite U(n) est décroissante.