Réponses

  • Utilisateur Brainly
2012-11-08T15:04:44+01:00

n(n+3)=n^2+3n et (n+1)(n+2)=n^2+3n+2 donc ....?

Meilleure réponse !
2012-11-08T15:08:51+01:00

(n+1)(n+2)=p+2

n*2+1n+2+2n=p+2-2

n*2+1n+2n=p

n(n+1+2)=p

p=n(n+3)