问题
解答题
计算
|
答案
÷(a2-b2 ab
-1 a
),1 b
=
÷(a+b)(a-b) ab
,b-a ab
=
•(a+b)(a-b) ab
,ab b-a
=
•(-(a+b)(a-b) ab
),ab a-b
=-(a+b),
=-a-b.
计算
|
÷(a2-b2 ab
-1 a
),1 b
=
÷(a+b)(a-b) ab
,b-a ab
=
•(a+b)(a-b) ab
,ab b-a
=
•(-(a+b)(a-b) ab
),ab a-b
=-(a+b),
=-a-b.