找规律(数学)
问题描述:
找规律(数学)
{1}1/2,3/4,9/8,27/16········{2}1/2,1/3,1/4,1/9,1/8,1/27,.{3}2/5,1/5,1/15,1/30,1/90,.
答
(1)分子是乘3倍,分母乘2倍
(2)1/16,1/81
(3)1/180,1/540