如果x+2y−8z=02x−3y+5z=0,其中xyz≠0,那么x:y:z=( )
如果x+2y−8z=02x−3y+5z=0,其中xyz≠0,那么x:y:z=( )
如果{x+2y-8z=0 2x-3y+5z=0,其中xyz不等于零,那么x+y/z=
已知:(x+y-z)/z=(x-y+z)/y+(y+z-x)/x,且xyz≠0,求代数式[(x+y)(y+z)(x+z)
已知x+y-z/z=x-y+z/y=-x+y+z/x,且xyz不等于0,求分式[(x+y)(x+z)(y+z)]/xyz
已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值
已知x+y-7z=0 x-2y+5z=0(xyz不等于0),求x+2y-z/y-2x+12z
X+2Y+8Z=0 2X-3Y-5Z=0 XYZ≠0 x:y:z=
已知2x-4y-5z=0,-3x+y+4z=0,(xyz≠0)则x:y:z=________
已知 xyz≠0,且x+3y+z=0,2x+3y-z=0,求x+2y-7z/3x+5y+z 的值..
已知方程组4x−5y+2z=0x+4y−3z=0(xyz≠0),则x:y:z等于( )
设X+Y+Z=0求X^3+X^2Z-XYZ+Y^2Z+Y^3的值
3道高数题,1,函数F(x,y,z)=(e^x) * y * (z^2) ,其中z=z(x,y)是由x+y+z+xyz=