1+2+3+4..........+150=?

Răspuns :

suma lui Gauss:
s= n(n+1)/2
s= 150(150+1)/2
s= 150•151/2
s= 22650/2
s= 11325

1 + 2 + 3 + ... + 150 =

= 150*151 : 2

= 11325