已知XYz满足|X-Y|/4+z^2-z+1/4+根号2y+z=0,求(y+z)的值.

已知x、y、z满足x+y+z=xyz,求证：x(1-y^2)(1-z^2)+y(1-x^2)(1-z^2)+z(1-x^2)(1-y^2)=4xyz 已知XYz满足|X-Y|/4+z^2-z+1/4+根号2y+z=0,求(y+z)的值. 已知xyz满足z+y+z=xyz 求证：x(1-y2)(1-z2)+y(1-x2)(1-z2)+z(1-x2)(1-y2)=4xyz 已知有实数x,y,z满足x^2+4y^2+z^2-2x-12y+4z+14=0,求xyz的值. 已知有理数x,y,z满足(x-z-2)^2+(3x-6y-7)^2+|3y+3z-4|=0求xyz的值 已知有理数x.y.z满足（x-z-2)^2+(3x-6y-7)^2=/3y+3z-4/=0求xyz=多少 已知xyz满足方程组x+4y-3z=0,求x：y：z的值 4x-5y+2z=0 已知xyz满足x-2y+3z=0,2x-3y+4z=0,求x:y:z 已知有理数x,y,z满足条件：|x-z-2|+|3x-6y-7|+（3y+3z-4）^2=0,则xyz=? 已知xyz满足x-2y+3z=0,2x-3y+4z=0,求x:y:z 数学已知xyz满足x-2y+3z=0,2x+3y+4z=0,求x:y:z 已知xyz满足x-2y+z=0和7x+4y-5z=0,求x:y:z 已知XYZ满足(X-Z-2)的平方+(3X-6Y-7)的平方+3Y+3Z-4的绝对值=0,则xyz= 已知有理数xyz 满足|x-z-2|+（3x-6y-7)的二次方+|3y+3z-4|=0 ,求xyz的值. 已知XYZ满足／x-2-z／+（3x-6y-7）²+／3y+3z-4／＝0.求XYZ的值 正数XYZ满足(X+Y)(X+Z)=2则XYZ(X+Y+Z)最大值 已知xyz满足|3x-2y+z|+|2x+y+2z|=0（xyz不等于o）求x+y除以z 已知实数xyz满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3求x+y+z的值