找规律:0,4,16,48,128,( )
问题描述:
找规律:0,4,16,48,128,( )
答
an=(n-1)*2^n
(6-1)*2^6=5*64=320
找规律:0,4,16,48,128,( )
an=(n-1)*2^n
(6-1)*2^6=5*64=320