Răspunsuri

2014-10-04T08:47:32+03:00
1+2+3+4+...+999=999x1000:2=499500
Cel mai inteligent răspuns!
2014-10-04T08:48:12+03:00
Se face cu suma lui Gauss

1+2+3+...+999=
n(n+1)/2=
999*1000/2=
999*500=499500
2 5 2