问题
填空题
当x=
|
答案
-1 x2-1 x2-x
=
-1(x+1)(x-1) x(x-1)
=
-x+1 x x x
=x+1-x x
=
，将x=1 x
代入上式中得，2
原式=
=1 x
=1 2
．2 2
故答案为：
．2 2
搜题请搜索小程序“爱下问搜题”
当x=
|
-1 x2-1 x2-x
=
-1(x+1)(x-1) x(x-1)
=
-x+1 x x x
=x+1-x x
=
，将x=1 x
代入上式中得，2
原式=
=1 x
=1 2
．2 2
故答案为：
．2 2