问题
解答题
先化简式子(
|
答案
原式=(a+2)÷(a+1)•(a+1)(a-1) a(a+2)
=
•a+2 a+1 (a+1)(a-1) a(a+2)
=
,a-1 a
当a=2时,原式=
=2-1 2
.1 2
先化简式子(
|
原式=(a+2)÷(a+1)•(a+1)(a-1) a(a+2)
=
•a+2 a+1 (a+1)(a-1) a(a+2)
=
,a-1 a
当a=2时,原式=
=2-1 2
.1 2