2x+y=10 4y+2=21 5x-z=10 求xyz的值,此题怎么解啊
2x+y=10 4y+2=21 5x-z=10 求xyz的值,此题怎么解啊
x*x+y*y+2z*z-2x+4y+4z+7=0,求xyz的值
已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值
若 x/2等于y/3等于z/4,且x+y-z=5 求xyz的值
设X+Y+Z=0求X^3+X^2Z-XYZ+Y^2Z+Y^3的值
有实数x,y,z;已知x+y+z=2,xyz=4;求Z的取值区间
已知xyz满足x+y+z=30,3x+y-z=50,设t=5x+4y+2z 1当t=40时,求xyz的值 2若xyz均为
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+z=0 7x+4y-5z=0,求y+z分之x的值
已知xyz适合关系式√3x+y-z-2+√2x+y-z=√x+y-2011+2011-x-y,试求xyz的值
已知{4x-5y 2z=0/x 4y-3x=0(xyz不等于0),求x:y:z:d的值
若xyz不等于0,且满足(y+z)/x=(x+z)/y=(x+y)/z,求(y+z)(x+z)(x+y)/xyz的值