Question

Suma Gauss Repede dau coroana cine rezolva corect :
2+4+6+8+.....+68

Answer 1

2+4+6+8+...+68=2(1+2+3+4...+34)=2(34x35:2)=2x595=1190

Answer 2

2+4+6+8+.....+68 =
=2(1+2+3+4+...+34)
=2x34x35:2
=1190