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