Question

1+2+3....+100=? Va rog urgent

Answer 1

1+2+3+4+...+100=100*101/2=50*101=5*10*101=505*10=5050

Answer 2

Este o formula: 1+2+3+...+n=n+(n+1)/2
In cazul tau:
1+2+3+...+100=
=100+101/2=
=201/2=
=105.5

Sper ca te-am ajutat!