Răspunsuri

Cel mai inteligent răspuns!
2014-04-07T19:19:41+03:00
1+5+10+...+2010=1+5(1+2+..+402)=1+5*402*403/2=1+5*201*403=1+1005*403=1+ 405015= 405016

3 5 3
2014-04-07T19:48:16+03:00