(1)计算:|-3|-4+(-2)0-(13)-1(2)计算:(2aa-1-aa+1)•a2-1a.-数学

题目简介

(1)计算:|-3|-4+(-2)0-(13)-1(2)计算:(2aa-1-aa+1)•a2-1a.-数学

题目详情

(1)计算:|-3|-
4
+(-
2
0-(
1
3
-1
(2)计算:(
2a
a-1
-
a
a+1
)•
a2-1
a
题型:解答题难度:中档来源:不详

答案

(1)原式=3-2+1-3
=-1;

(2)原式=
2a(a+1)-a(a-1)
(a-1)(a+1)
(a+1)(a-1)
a

=
a(a+3)
(a-1)(a+1)
(a+1)(a-1)
a

=a+3.

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