N 3 2n 1 3n 2 July 8, 2019 16 32 64 128 Lim n 3 2n 1 3n 2 N 3 2n n 4 3n 2 1 Lim n 2n 1 )( 3n 2 )/( 6n 1 3 2 3 n
