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2014-10-05T14:40:48+03:00
1+2+3+....+60=60X61:2=1830SE APLICA SIRUL LUI GAUS 1+2+3+..+N=N(N+1):2

  • Utilizator Brainly
2014-10-05T14:42:45+03:00
S=n (n+1)/2,
 n = ultimul număr al sumei
S=60 (60+1)/2= 60*61/2=1830
S=1830