4X=6Y=9Z 则X:Y:Z=
(x+y-z)(x-y+z)=
若x:y:z=3:4:6,则x-y+z分之x+y-z的值为?
已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少
X+Y+Z=?
解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18
若{x+3y+10z=0 则 (x+y-z)/(x-y+z)
已知3X=4X,5Y=6Z求X+Y:Y+Z
解方程一;{x+y-z=6,x-3y+2z=1,3x+2y-z=-7.②{3x+4z=7,2x+3y+z=9,5x-9y
f(x,y,z,w)=x*(x+y)*(x+y+z)*(x+y+z+w)
已知实数x,y,z满足x=6-y,z^2-4z+4=xy-9,求x,y,z的值.
已知实数x,y,z满足x=6-y,z^2-4z+4=xy-9,求x,y,z的值
1.设X ,Y,Z 成等差数列,代数式(X-Z)*(X-Z)+ 4(X-Y)(Z-Y)=