A b c d 2 3 July 8, 2019 16 32 64 128 A b c d 2 3 4 5 A b c d 1 2 3 4 A 4 b 3 c 2 d 1 f 0 A 1 b 2 c 3 d A 5 b 4 c 3 d 2 e 1 A b √ 2 c √ 3 d √ 6 0 A b c d e f 2 3 Giả sử a a b c d 2 3 4 A 0 b 1 c 2 d 3 e 4 A 0 b 1 c 2 d 3 A 3 b 5 c 2 d 3 A b 2 3 c d 4 7 A b c 2 d 2 e 3 f 3 16 A b 2 c 3 d 4 A. aphid b. 3 c. 2 d. pill bug
