(1)计算:12-|-1|+(12)-3-4cos30°(2)化简.(x+1x-xx-1)÷1(x-1)2.-数学

题目简介

(1)计算:12-|-1|+(12)-3-4cos30°(2)化简.(x+1x-xx-1)÷1(x-1)2.-数学

题目详情

(1)计算:
12
-|-1|+(
1
2
)-3-4cos30°

(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=2
3
-1+8-2
3

=7;
(2)原式=
x2-1-x2
x(x-1)
×(x-1)
=class="stub"1-x
x

故答案为:7,class="stub"1-x
x

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