问题
选择题
已知0<x<1,则
|
答案
∵0<x<1,
∴原式=
+[x2+(
)2+2]1 x [x2+(
)2-2]1 x
=
-(x+
)21 x (x-
)21 x
=x+
-(1 x
-x)1 x
=2x.
故选B.
已知0<x<1,则
|
∵0<x<1,
∴原式=
+[x2+(
)2+2]1 x [x2+(
)2-2]1 x
=
-(x+
)21 x (x-
)21 x
=x+
-(1 x
-x)1 x
=2x.
故选B.