Let a 1 2 3 n and b ab July 8, 2019 16 32 64 128 Let a 1 2 3 n and b abc Let a 1 2 3 n and b ab then number of surjections from a to b is Let a= 1 2 3 Let a = 1 2 Let a = 1 let b = 2 a = b 1 2 3 4 a b c d e f g
