176k views
1 vote
1+2+3+....+2012+2013

User Mariel
by
6.6k points

1 Answer

5 votes

Answer:

Un=n(n+1)/2

U=2013(2013+1)/2

U=2.027.091

User Patrick Vogt
by
6.8k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.