If a 1 b 2 c 3 d 4 July 8, 2019 16 32 64 128 If a 1 b 2 c 3 d 4 a b c d 5 then a b c d is If a 1 3 b (- 1 2 c x 4 and d 2 5 If a b 1 2 b c 2 3 and c d 3 4 find a b c d If 1 2 3
