y=
|
∵y=
+x2-4
+4-x2
,x2+x+8 2+x
∴x2-4≥0,4-x2≥0,2+x≠0,
∴x=2,
x=2代入得:=0+0+
=4+2+8 2+2
,7 2
∴x
+yy
-2x
═214
+7 2 7 2
-22
=14
+14 7 2
-22
=14 7 2
-2
,14
故答案为:7 2
-2
.14
y=
|
∵y=
+x2-4
+4-x2
,x2+x+8 2+x
∴x2-4≥0,4-x2≥0,2+x≠0,
∴x=2,
x=2代入得:=0+0+
=4+2+8 2+2
,7 2
∴x
+yy
-2x
═214
+7 2 7 2
-22
=14
+14 7 2
-22
=14 7 2
-2
,14
故答案为:7 2
-2
.14