找规律填空:6.25 2.5 1( )( )
问题描述:
找规律填空:6.25 2.5 1( )( )
答
6.25 2.5 1(0.4 )(0.16 )
答
是等比数列
6.25
2.5 = 6.25 / 2.5
1 = 2.5 / 2.5
(0.4) = 1 / 2.5
(0.16) = 0.4 / 2.5