Question

 ajutor cum se rezolva calculati urmatoarele sume 1) 2+3+4+......+50 =        2)1+2+3+........+500 va multumesc anticipat

Answer 1

1)   2+3+4+...+50 = 1 + 2+3+4+...+50 - 1 = (50*51/2) - 1 = 1275-1=1274;
2)   1+2+3+ ... +500 = (500*501/2) = 250*501 =125250;