Question

2 (la puterea1 ) + 2 (la puterea 2 ) + ... + 2 (la puterea 100 ) este divizibil cu 3 ?

Answer 1

2(1+2) +2³(1+2)+...2^99(1+2) =3(2^1+2³+..+2^99) divizibil cu 3
as simple as that!!