问题
解答题
计算: (1)
(2)
|
答案
(1)原式=
+a+1 (a-1)(a+1) 2 (a-1)(a+1)
=2+a+1 (a-1)(a+1)
=
.a+3 a2-1
(2)原式=
+a-1 (a+1)(a-1) a a+1
=
+1 a+1 a a+1
=a+1 a+1
=1.
计算: (1)
(2)
|
(1)原式=
+a+1 (a-1)(a+1) 2 (a-1)(a+1)
=2+a+1 (a-1)(a+1)
=
.a+3 a2-1
(2)原式=
+a-1 (a+1)(a-1) a a+1
=
+1 a+1 a a+1
=a+1 a+1
=1.