Răspunsuri

Cel mai inteligent răspuns!
2014-11-03T19:53:39+02:00
Aplicam formula [n(n+1)]/2 unde n= ultimul nr
1+2+3+...+999=[999(999+1)]/2= (999 ori 1000)/2
simplificam 1000 cu 2 si avem.. 999 ori 500= 499500


3 3 3
2014-11-03T19:56:56+02:00
1+2+3+...+999=[999(999+1)]/2= (999 ori 1000)/2
1 4 1