数列20/9,4/3,7/9,4/9,1/4,() A.5/36,B.1/6,C.1/9,D.1/14
问题描述:
数列20/9,4/3,7/9,4/9,1/4,() A.5/36,B.1/6,C.1/9,D.1/14
答
A.5/36
20/9=20/9
4/3=24/18,
7/9=28/36,
4/9=32/72,
1/4=36/144,
40/288=5/36