3) a) 6 la puterea a 2 < 45 < 7 la puterea a 2 b) 11 la puterea 2 < 121 < 12 la puterea a 2 c) 15 la puterea a 2 < 246 < 16 la puterea a 2 d) 2 la puterea a 6 < 2 la puterea a 7 < 2 la puterea a 8 e) 3 la puterea a 4 < 3 la puterea a 5 < 3 la puterea a 6