1,3/2,11/6,25/12,( )
A.133/60
B.137/60
C.141/60
D.147/60
答案:B
解析:3/2-1=1/2 11/6-3/2=1/3 25/12-11/6=1/4 所以 X-25/12=1/5 X=137/60
数列问题