Question

2 la puterea a 1997 - 2 la puterea a 1996;
5 la puterea a 1997 + 20 inmultit 5 la puterea a 1996

Answer 1

2^1777-2^1996=2*2^1996-2^1996=2^1996

5^1997+4*5*5^1996=5^1997+ 4*5^1997=5*5^1997=5^1998