Question

1+2+3+..+73= ma pteti ajuta va rog va rog

Answer 1

(73*74):2

este suma lui gauss

Answer 2

$S=1+2+3+...+73\\\\Folosim\ Suma\ lui\ Gauss:\ \\\\S=73\cdot74\div2\\\\S=73\cdot37\\\\\boxed{S=2701}$