Glossary

Factorielle
Middle school year 6 Générale Spécialité

Description

Définition

Soit n un entier naturel.
On appelle factorielle de n le nombre noté n! défini par :
  • 0!=1
  • et pour tout n∈ℕ, (n+1)!=(n+1)×n!.

Théorème

Pour tout entier naturel n tel que n⩾2, n!=1×2×…×(n−1)×n.
Author of the page: Euler, Académie de Versailles
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