问题
解答题
化简求值：(
|
答案
原式=
•(x+1)(x-1)+1 (x-1)2 x-1 x2
=
•x2 (x-1)2 x-1 x2
=
．1 x-1
将x=
+1代入上式得：原式=2
=1
+1-12
．2 2
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化简求值：(
|
原式=
•(x+1)(x-1)+1 (x-1)2 x-1 x2
=
•x2 (x-1)2 x-1 x2
=
．1 x-1
将x=
+1代入上式得：原式=2
=1
+1-12
．2 2