问题
解答题
计算:(
|
答案
原式=[
+x+1 (x-1)(x+1)
]•x-1 (x-1)(x+1) (1-x)(1+x) 3x
=
•2x (x-1)(x+1) (1-x)(1+x) 3x
=-
.2 3
故答案是:-
.2 3
计算:(
|
原式=[
+x+1 (x-1)(x+1)
]•x-1 (x-1)(x+1) (1-x)(1+x) 3x
=
•2x (x-1)(x+1) (1-x)(1+x) 3x
=-
.2 3
故答案是:-
.2 3