化简x+1x-1-x2-2xx2-1÷x2-x-2x2+2x+1的结果是______.-数学

题目简介

化简x+1x-1-x2-2xx2-1÷x2-x-2x2+2x+1的结果是______.-数学

题目详情

化简
x+1
x-1
-
x2-2x
x2-1
÷
x2-x-2
x2+2x+1
的结果是______.
题型:填空题难度:中档来源:四川

答案

class="stub"x+1
x-1
-
x2-2x
x2-1
÷
x2-x-2
x2+2x+1

=class="stub"x+1
x-1
-
x(x-2)
(x+1)(x-1)
(x+1)2
(x-2)(x+1)

=class="stub"x+1
x-1
-class="stub"x
x-1
=class="stub"1
x-1

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