问题
解答题
计算: (1)
(2)(1+
|
答案
(1)原式=
-x+1 (x+1)(x-1) x (x+1)(x-1)
=x+1-x (x+1)(x-1)
=
;1 x2-1
(2)原式=
÷x+1 x 2x2-(1+x2) x
=
•x+1 x x (x+1)(x-1)
=
.1 x-1
计算: (1)
(2)(1+
|
(1)原式=
-x+1 (x+1)(x-1) x (x+1)(x-1)
=x+1-x (x+1)(x-1)
=
;1 x2-1
(2)原式=
÷x+1 x 2x2-(1+x2) x
=
•x+1 x x (x+1)(x-1)
=
.1 x-1