计算x-1x÷(x-1x)的结果为()A.1B.x-1x2-1C.1x-1D.1x+1-数学

题目简介

计算x-1x÷(x-1x)的结果为()A.1B.x-1x2-1C.1x-1D.1x+1-数学

题目详情

计算
x-1
x
÷(x-
1
x
)
的结果为(  )
A.1B.
x-1
x2-1
C.
1
x-1
D.
1
x+1
题型:单选题难度:偏易来源:不详

答案

class="stub"x-1
x
÷(x-class="stub"1
x
)
=class="stub"x-1
x
÷
x2-1
x
=class="stub"x-1
x
•class="stub"x
(x+1)(x-1)
=class="stub"1
x+1
,故选D.

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