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> 化简:(1)62-18-(12)0;(2)a+1a-1•a2-1a+1-1.-数学
化简:(1)62-18-(12)0;(2)a+1a-1•a2-1a+1-1.-数学
题目简介
化简:(1)62-18-(12)0;(2)a+1a-1•a2-1a+1-1.-数学
题目详情
化简:(1)
6
2
-
18
-(
1
2
)
0
;
(2)
a+1
a-1
•
a
2
-1
a+1
-1
.
题型:解答题
难度:中档
来源:常州
答案
(1)原式=3
2
-3
2
-1=-1;
(2)原式=
class="stub"a+1
a-1
•
(a+1)(a-1)
a+1
-1
=a+1-1
=a.
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题目简介
化简:(1)62-18-(12)0;(2)a+1a-1•a2-1a+1-1.-数学
题目详情
(2)
答案
(2)原式=
=a+1-1
=a.