若x+y+1的绝对值与根号x-y+3互为相反数,则x的y次方=?

问题描述:

若x+y+1的绝对值与根号x-y+3互为相反数,则x的y次方=?

x y 1的绝对值≥0,√x-y 3≥0,二者互反,∴x y 1=0,x-y 3=0
解得:x=-2,y=1
x的y次方=-2

由于绝对值大于等于0,根号值也大于等于0,二者互为相反数,因此二者均等于0。即:
x y 1=0
x-y 3=0
求解方程组得x=-2,y=1
因此x^y=(-2)^1=-2

x+y+1的绝对值与根号x-y+3互为相反数
|x+y+1|=0, √(x-y+3)=0
x+y+1=0
x-y+3=0
x=-2 y=1
x^y=(-2)¹=-2

|x+y+1|+√(x-y+3)=0
则:x+y+1=0
x-y+3=0
解得:x=-2,y=1
所以,x的y次方=-2
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若|x+y+1|与√(x-y+3)互为相反数,
则|x+y+1|+√(x-y+3)=0
∴|x+y+1|=0,√(x-y+3)=0
{x+y+1=0
x-y+3=0
解得:{x=-2
y=1
∴x^y=(-2)¹=-2