问题
解答题
已知
|
答案
∵
+1 x
=5,2 y
∴
=5,2x+y xy
∴2x+y=5xy,
∴原式=
=2x+y+xy 4(2x+y)-3xy
=5xy+xy 4×5xy-3xy
=6xy 17xy
.6 17
已知
|
∵
+1 x
=5,2 y
∴
=5,2x+y xy
∴2x+y=5xy,
∴原式=
=2x+y+xy 4(2x+y)-3xy
=5xy+xy 4×5xy-3xy
=6xy 17xy
.6 17