问题
解答题
当a=
|
答案
∵a=
=2-2- 3 (2+
)(2-3
)3
,3
∴a-1=2-
-1=1-3
<0,3
则原式=
-(a-1)2 a-1
-|a-1| a(a-1)
=a-1+1 a
-1 a
=a-1=2-1 a
-1=1-3
.3
当a=
|
∵a=
=2-2- 3 (2+
)(2-3
)3
,3
∴a-1=2-
-1=1-3
<0,3
则原式=
-(a-1)2 a-1
-|a-1| a(a-1)
=a-1+1 a
-1 a
=a-1=2-1 a
-1=1-3
.3