Question

Afla 6+12+18+............+5412 sume Gauss

Answer 1

$6 \times 1 + 6 \times 2 + 6 \times 3 + \: \: \: \: + 6 \times 902 = 6(1 + 2 + 3 \: \: \: \: \: + 902) = 6 \times \frac{902 \times 903}{2}$

Answer 2

6+12+18+.......+5412=
6×(1+2+3+......902)=
6×902×903:2=
2443518