问题
解答题
计算与化简: (1)
(2)(
|
答案
(1)原式=
+(3-a2 (a+1)2
-a+1 a+1
)÷(1 a+1
+a-1 a-1
)1 a-1
=
+3-a2 (a+1)2
•a a+1 a-1 a
=
+3-a2 (a+1)2 a-1 a+1
=
+3-a2 (a+1)2 a2-1 (a+1)2
=2 (a+1)2
=
.2 a2+2a+1
(2)原式=-
•c2 a2b2
•b3 a3c3 a4 b4
=-a4b3c2 a5b6c3
=-
.1 ab3c