若/3x+1/与（y+1）²互为相反数,求xy的值 - 知识问答

若/3x+1/与（y+1）²互为相反数,求xy的值求（-x)³-y的100次方

2个回答

/3x+1/+（y+1）²=0
/3x+1/=0
x=-1/3
（y+1）²=0
y=-1
xy=-1/3*(-1)=1/3
(-x)^3-y^100
=[-(-1/3)]^3-(-1)^100
=(1/3)^3-1
=1/27-1
=-26/27

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