Sn 3 2 n 1 July 8, 2019 16 32 64 128 Sn 2 3 n 1 Sn 3 2n 1 Sn 1 2 3 4 n Cho sn 1 2 3 4 1 n 1 If for a sequence sn 2 3 n 1 If for a sequence sn 2 3 n 1 then the third term is If for a sequence sn 2 3 n 1 find the nth term Let sn 1 2 3 n Sn 1 3n n 1 )( n 2 Sn n 3 6n 2 11n
