Question

Astea 2 va rog e cu Suma lui Gauss, E FOARTE URGENT VA ROGGG!! DAU COROANA

Answer 1

Răspuns:

((1+100)*100)/2=(101*100)/2=5050

((2+50)*25)/2=(52*25)*2=650

Answer 2

Răspuns:

1+2+3+4+..+n=[(n(n+1)]/2 - suma lui Gauss

1+2+3+4+...+100=100(100+1)/2=100·101:2=5050

________

2+4+6+8+...+50=2(1+2+3+4+...+25)=2·25·26:2=25·26=650