A.125
B.179
C.261
D.273
[单选题]3,5,21,73,261,( )A.522B.929C.984D.783
[单选题]3,5,21,73,261,( )A.522B.929C.984D.783
[单选题]3,5,21,73,261,( )。A.522B.929C.984D.783
[单选题]3,5,21,73,261,( )。A.522B.929C.984D.783
[单选题]3,5,21,73,261,( )。A.522B.929C.984D.783
[单选题]3,5,21,73,261,( )。A.522B.929C.984D.783
[单选题]3,5,21,73,261,( )。A.522B.929C.984D.783
[单选题]2,3,5,8,( ),21A.12B.13C.14D.15
[主观题]填空。2/7=()/219/12=3/()5÷3=()/()=1又()/()
计算:(1)/(3)×(3)/(5)+1(5)/(7)-(5)/(9)×(5)/(7)1-(5)/(7)×(21)/(25)(1)/(2)+(5)/(4)×(4