问题
解答题
计算: (1)(
(2)(1+
|
答案
(1)原式=
•x-2-x x+2 x+2 x-1
=
•-2 x+2 x+2 x-1
=
;2 1-x
(2)原式=
•x+1 x x-1 x+1
=
.x-1 x
计算: (1)(
(2)(1+
|
(1)原式=
•x-2-x x+2 x+2 x-1
=
•-2 x+2 x+2 x-1
=
;2 1-x
(2)原式=
•x+1 x x-1 x+1
=
.x-1 x