找规律填数:4/5,2/5,1/5,( ),1/20,( ),( ) 找规律填数:2/3,1,3/2,4/9,( ),( ).
问题描述:
找规律填数:4/5,2/5,1/5,( ),1/20,( ),( ) 找规律填数:2/3,1,3/2,4/9,( ),( ).
要写正确!
答
(1)每次都除以二4/5,2/5,1/5,(1/10),1/20,(1/40),(1/80)(2) 2/3=(3^-1)/(2^-1) 1=3^0/2^0 3/2=(3^1)/(2^1) 以此类推()中为(3^3)/(2^3) (3^4)/(2^4)2/3,1,3/2,9/4,(27/8 ),(81/16 )...