(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 )
(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 )