Question

Calculati urmatoarele suma gaus dand factor comun

Answer 1

1)2(1+2+3+...+500)=(2•500•501)/2=500•501

2)3(1+2+3+...+500)=(3•500•501)/2=3•250•501

3)4(1+2+3+...+500)=(4•500•501)/2=2•500•501

5)50(1+2+3+...+100)=(50•100•101)/2=25•100•101