Răspunsuri

2014-09-30T18:55:42+03:00
Calculam a appoi b si facem impartirea
a=3(1+2+3+...+670)=3 ·(670·671):2=674355
b=1+2+3+...+670=(670·671):2=224785
a:b=674355:224785=3