Răspunsuri

2014-10-04T14:17:16+03:00
(2015+1):2-11->sunt 997 numere in total
Acum facem formula lui Gauss( \frac{n(n+1)}{2} :
1+2+3+..+997
 \frac{997*998}{2}
997*499=
=497503

2014-10-04T14:19:51+03:00
2013+2014+2015+....+11+13+15 2024•2015= 4078360