问题
解答题
先化简,再求值:(
|
答案
原式=[
+x+2 x-2
]•4 (x-2)2 x-2 x
=
•x2 (x-2)2 x-2 x
=
,x x-2
当x=2+
时,原式=2
=2+ 2 2+
-22
=2
+22 2
+1.2
先化简,再求值:(
|
原式=[
+x+2 x-2
]•4 (x-2)2 x-2 x
=
•x2 (x-2)2 x-2 x
=
,x x-2
当x=2+
时,原式=2
=2+ 2 2+
-22
=2
+22 2
+1.2