若丨x-3丨+(x-y+1)^2=0,计算根号X^2Y + XY^2 +4分之y^3=根号X2Y + XY2 +Y2

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若丨x-3丨+(x-y+1)^2=0,计算根号X^2Y+XY^2+4分之y^3=根号X2Y+XY2+Y2若丨x-3丨+(x-y+1)^2=0,计算根号X^2Y+XY^2+4分之y^3=根号X2Y+XY

若丨x-3丨+(x-y+1)^2=0,计算根号X^2Y + XY^2 +4分之y^3=根号X2Y + XY2 +Y2
若丨x-3丨+(x-y+1)^2=0,计算根号X^2Y + XY^2 +4分之y^3=
根号X2Y + XY2 +Y2

若丨x-3丨+(x-y+1)^2=0,计算根号X^2Y + XY^2 +4分之y^3=根号X2Y + XY2 +Y2
丨x-3丨+(x-y+1)^2=0
则x=3,y=4
所以x^2y+xy^2+y^3/4
=3^2*4+3*4^2+4^3/4
=36+48+16
=84+16
=100

由丨x-3丨+(x-y+1)^2=0,则有X-3=0,X=3;X-Y+1=0=3-Y+1,则Y=4,则
Y^3/(X^2Y+XY^2+4)=4^3/(3^2X4+3X4^2+4^2)=64/100,根号(64/100)=0.8.