问题 解答题
化简:(x+
x
x2-1
)÷(2+
1
x-1
-
1
x+1
)
答案

(x+

x
x2-1
)÷(2+
1
x-1
-
1
x+1

=

x3-x+x
x2-1
÷
2(x2-1)+x+1-x+1
(x+1)(x-1)

=

x3
(x+1)(x-1)
(x+1)(x-1)
2x2

=

x
2

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