问题
解答题
计算(
|
答案
原式=[
+a+1 a(a-1)
]÷4 (1-a)(1+a) (a+3)(a-1) (a+3)
=
÷(a-1)(a+1)2-4a a(a+1)(a-1)
=
•(a-1)2 a(a+1)(a-1) 1 a-1
=
.1 a2+a
故答案为
.1 a2+a
计算(
|
原式=[
+a+1 a(a-1)
]÷4 (1-a)(1+a) (a+3)(a-1) (a+3)
=
÷(a-1)(a+1)2-4a a(a+1)(a-1)
=
•(a-1)2 a(a+1)(a-1) 1 a-1
=
.1 a2+a
故答案为
.1 a2+a