问题
解答题
先化简:
|
答案
原式=
-1 x(x-1)
•x-2 (x-1)2
=x-1 x-2
-1 x(x-1)
=1 x-1
=-1-x x(x-1)
,1 x
当x=3时,原式=-
.1 3
先化简:
|
原式=
-1 x(x-1)
•x-2 (x-1)2
=x-1 x-2
-1 x(x-1)
=1 x-1
=-1-x x(x-1)
,1 x
当x=3时,原式=-
.1 3