问题
填空题
若实数x，y满足
|
答案
由
-1 x
=5，得y-x=5xy，1 y
∴x-y=-5xy，
∴原式=
=3(x-y)-2xy (x-y)+xy
=-15xy-2xy -5xy+xy
=-17xy -4xy
．17 4
故答案为
．17 4
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若实数x，y满足
|
由
-1 x
=5，得y-x=5xy，1 y
∴x-y=-5xy，
∴原式=
=3(x-y)-2xy (x-y)+xy
=-15xy-2xy -5xy+xy
=-17xy -4xy
．17 4
故答案为
．17 4
At times ,worrying is a normal, ________response to a difficult event or situation—a loved one being injured in an accident , for example.