Question

Cât e suma numerelor 2+4+6+...2004

Answer 1

S=2+4+6+..+2004
S= 2 × ( 1+2+3+..+1002)
S= 2 ×$\frac{1002*1003}{2}$
S=2×$\frac{1005006}{2}$
S= 2×502503
S=1005006