问题
解答题
已知x=
|
答案
原式=[
-x+1 x(x-1)
]÷x (x-1)2 1 x
=
•xx2-1-x2 x(x-1)2
=-
;1 (x-1)2
当x=
+1时,原式=-2
=-1 (
+1-1)22
.1 2
已知x=
|
原式=[
-x+1 x(x-1)
]÷x (x-1)2 1 x
=
•xx2-1-x2 x(x-1)2
=-
;1 (x-1)2
当x=
+1时,原式=-2
=-1 (
+1-1)22
.1 2