问题
解答题
先化简：
|
答案
∵原式=
+(x+1)(x-1) (x-1)2
•x(x-2) x-2 1 x
=
+1x+1 x-1
=2x x-1
∴当x=3时，原式=
=3．2x x-1
搜题请搜索小程序“爱下问搜题”
先化简：
|
∵原式=
+(x+1)(x-1) (x-1)2
•x(x-2) x-2 1 x
=
+1x+1 x-1
=2x x-1
∴当x=3时，原式=
=3．2x x-1