问题
解答题
(1)化简
(2)已知x=-3,求(1-
|
答案
(1)原式=
•x (x+1)(x-1) x(x+1) x2
=
;1 x-1
(2)原式=
•x-1 x x (x-1)2
=
,1 x-1
当x=-3时,原式=
=-1 -3-1
.1 4
(1)化简
(2)已知x=-3,求(1-
|
(1)原式=
•x (x+1)(x-1) x(x+1) x2
=
;1 x-1
(2)原式=
•x-1 x x (x-1)2
=
,1 x-1
当x=-3时,原式=
=-1 -3-1
.1 4