问题
解答题
(1)已知x=
(2)计算:2
|
答案
(1)原式=
÷x-1 x
=(x-1)2 x
•x-1 x
=x (x-1)2
,1 x-1
当x=
+1时,原式=2
=1 2
;2 2
(2)原式=4+2-(3-2)
=6-1
=5.
(1)已知x=
(2)计算:2
|
(1)原式=
÷x-1 x
=(x-1)2 x
•x-1 x
=x (x-1)2
,1 x-1
当x=
+1时,原式=2
=1 2
;2 2
(2)原式=4+2-(3-2)
=6-1
=5.