Răspunsuri

2014-11-12T18:32:55+02:00
E suma Gauss: 1+2+3+...+n= n(n+1)/2 N e ultimul numar In cazul tau 50 e n deci 50(50+1)/2= 50x51:2 si faci calculul
2014-11-12T18:50:35+02:00
S=[(T1+Tultim)•nr termeni]:2
S=[(1+50)•50]:2
S=(51•50):2
S=2550:2
S=1275