问题
填空题
化简：
|
答案
+1 x-1
=1 x2-1
+x+1 (x+1)(x-1)
=1 (x+1)(x-1)
=x+2 (x+1)(x-1)
．x+2 x2-1
故答案为：
．x+2 x2-1
搜题请搜索小程序“爱下问搜题”
化简：
|
+1 x-1
=1 x2-1
+x+1 (x+1)(x-1)
=1 (x+1)(x-1)
=x+2 (x+1)(x-1)
．x+2 x2-1
故答案为：
．x+2 x2-1