化简:m2-2m+1m2-1÷(m-1-m-1/m+1)=_.

问题描述:

化简:

m2-2m+1
m2-1
÷(m-1-
m-1
m+1
)=______.

原式=

(m-1)2
(m+1)(m-1)
×
m+1
m(m-1)
=
m-1
m+1
×
m+1
m(m-1)
=
1
m

故答案是
1
m