问题
填空题
分式(
|
答案
原式=
÷x+y+x-y (x-y)(x+y) x2y (x+y)(x-y)
=
×2x (x-y)(x+y) (x+y)(x-y) x2y
=
,2 xy
当x=
+1,y=3
-1时,3
原式=
=1.2 (
+1)(3
-1)3
故答案为:1.
分式(
|
原式=
÷x+y+x-y (x-y)(x+y) x2y (x+y)(x-y)
=
×2x (x-y)(x+y) (x+y)(x-y) x2y
=
,2 xy
当x=
+1,y=3
-1时,3
原式=
=1.2 (
+1)(3
-1)3
故答案为:1.