Răspunsuri

2014-10-05T18:02:08+03:00
3(1+2+3+4+....667)=3*667*668:2=668334
se aplica formula n(n+1)/2 suma gauss
1 3 1
2014-10-05T18:09:06+03:00
3(1 + 2 + 3 + 4 + ....+ 667) = 3 * 667 * (667 + 1)/2 = 2001 * 334 = 668 334
2 4 2