问题
解答题
计算：
|
答案
÷(a+1)-2a+2 a-1 a2-1 a2-2a+1
=
•2(a+1) a-1
-1 a+1 (a+1)(a-1) (a-1)2
=
-2 a-1 a+1 a-1
=
=-1．2-a-1 a-1
搜题请搜索小程序“爱下问搜题”
计算：
|
÷(a+1)-2a+2 a-1 a2-1 a2-2a+1
=
•2(a+1) a-1
-1 a+1 (a+1)(a-1) (a-1)2
=
-2 a-1 a+1 a-1
=
=-1．2-a-1 a-1