化简计算:(1)1-a-1a÷a2-1a2+2a(2)x-2x2÷(1-2x).-数学

题目简介

化简计算:(1)1-a-1a÷a2-1a2+2a(2)x-2x2÷(1-2x).-数学

题目详情

化简计算:
(1)1-
a-1
a
÷
a2-1
a2+2a

(2)
x-2
x2
÷(1-
2
x
)
题型:解答题难度:中档来源:不详

答案

(1)原式=1-class="stub"a-1
a
a(a+2)
(a+1)(a-1)

=1-class="stub"a+2
a+1

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

=-class="stub"1
a+1

(2)原式=class="stub"x-2
x2
÷class="stub"x-2
x

=class="stub"x-2
x2
class="stub"x
x-2

=class="stub"1
x

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