Question

3+6+9+………+252, suma Gauss dau coroana !!!!!

Answer 1

Răspuns:

3+6+9+………+252=3(1+2+3+....+84)=3(84·85)/2=3·3570=10710

Answer 2

3+6+9+....+252=3(1+2+3+....+84)

3=3(84×85)/2=3×3570=10710