问题
解答题
先化简,后求值:
|
答案
原式=
÷x-1 x
(1分)(x-1)2 x
=
•x-1 x
(2分)x (x-1)2
=
.(3分)1 x-1
当x=3,原式=
=1 3-1
.(4分)1 2
先化简,后求值:
|
原式=
÷x-1 x
(1分)(x-1)2 x
=
•x-1 x
(2分)x (x-1)2
=
.(3分)1 x-1
当x=3,原式=
=1 3-1
.(4分)1 2