已知0<x<1,则x2,x,1x大小关系是(  ) A.x2<x<1x B.x<x2<1x C.x<1x<x2 D.1x<x<x2

问题描述:

已知0<x<1,则x2,x,

1
x
大小关系是(  )
A. x2<x<
1
x

B. x<x2
1
x

C. x<
1
x
x2

D.
1
x
<x<x2

∵0<x<1,
∴可假设x=0.1,
则 x2=(0.1)2=

1
100
1
x
=
1
0.1
=10,
1
100
<0.1<10,
∴x2<x<
1
x

故选A.