(1)计算:27-63-1+(-π)0(2)化简:(1b-1a)•aba2-b2.-数学

题目简介

(1)计算:27-63-1+(-π)0(2)化简:(1b-1a)•aba2-b2.-数学

题目详情

(1)计算:
27
-
6
3
-1
+(-π)0
(2)化简:(
1
b
-
1
a
)•
ab
a2-b2
题型:解答题难度:中档来源:广西

答案

(1)原式=3
3
-3(
3
+1)+1
=3
3
-3
3
-3+1
=-2;
(2)原式=class="stub"a-b
ab
•class="stub"ab
(a+b)(a-b)
 
=class="stub"1
a+b

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