Il faut charger le package simplify_sum, puis taper
simplify_sum(sum(exp(-l)*l^(k)/(k!),k,0,inf))
----- Original Message -----
From: Jean Legeande
To: [email protected]
Sent: Wednesday, February 03, 2010 3:17 PM
Subject: [Maxima-lang-fr] Sommes infinies - séries
Bonjour,
Je souhaiterais calculer des sommes infinies. Comme exemple, j'ai pris
sum(exp(-l)*l^(k)/(k!),k,0,inf),simpsum=true;
Je devrais obtenir 1 mais Maxima ne calcule rien. Il ne fait que réécrire
l'expression.
Comment faire ? Par ailleurs comment préciser l'ensemble auquel $l$
appartient ?
Merci par avance,
Jean
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