问题
解答题
先化简,再求值:
|
答案
原式=
÷x (x+1)(x-1) x x-1
=
×x (x+1)(x-1) x-1 x
=
,1 x+1
∵x=2×
=3 2
,3
∴原式=
=1
+13
.
-13 2
先化简,再求值:
|
原式=
÷x (x+1)(x-1) x x-1
=
×x (x+1)(x-1) x-1 x
=
,1 x+1
∵x=2×
=3 2
,3
∴原式=
=1
+13
.
-13 2