359,519 views
24 votes
24 votes
Evaluate: sigma 20 and 1 = (3n+2)
HEEELLLPPP MEEEEE

User Igor Litvinovich
by
2.7k points

1 Answer

8 votes
8 votes

Answer:

Explanation:


\displaystyle \sum_(n=1)^(20) (3n+2)=((62+5)*20)/(2) =10*67=670\\

User Carlo Zanocco
by
2.9k points