三个数2^0.5,(2/3)^-1,3^1/3
比较大小关系……
2^0.5=1.414
(2/3)^-1,=1.5
3^1/3这个怎么算啊????
1.5*1.5*1.5=3.375
1.414*1.414*1.414=2.827145944
2^0.5<3^1/3<(2/3)^-1