计算或化简:(1)计算:2-1-3tan60°+(π-2011)0+|-12|.(2)化简:(x+1x-xx-1)÷1(x-1)2.-数学

题目简介

计算或化简:(1)计算:2-1-3tan60°+(π-2011)0+|-12|.(2)化简:(x+1x-xx-1)÷1(x-1)2.-数学

题目详情

计算或化简:
(1)计算:2-1-
3
tan60°+(π-2011)0+|-
1
2
|.
(2)化简:(
x+1
x
-
x
x-1
)  ÷
1
(x-1)2
题型:解答题难度:中档来源:不详

答案

(1)原式=class="stub"1
2
-
3
×
3
+1+class="stub"1
2

=-1;

(2)原式=
x2-1-x2
x(x-1)
×(x-1)2
=class="stub"-1
x
×(x-1)2
=-class="stub"x-1
x

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