已知x+y=27,y+z=32,x+z=29那么x,y,z各等于几?
已知X+Y=12 Y+Z=10 求X Y Z各等于几
已知三个质数x、y、z满是x+y+z+xyz=99那么|x-y|+|y-z|+|z-x|的值等于
(x+y-z)(x-y+z)=
已知x,y,z 大于0,x+y+z=2,求证 xz/y(y+z)+zy/x(x+y)+yx/z(z+x)大于等于2/3
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:(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)
X+Y+Z=?
y=-2X,Z=3y,那么X-Y+(-Z)等于
已知x,y,z满足x/(y+z)+y/(z+x)+z/(x+y)=1,求代数式x2/(y+z)+y2/(x+z)+z2/
已知实数x,y,z满足x/(y+z)+y/(z+x)+z/(x+y)=1,求x2/(y+z)+y2/(z+x)+z2/(
已知实数x,y,z,满足那么x+y=6,z^2=xy-9,求(x+y)^z
已知4X=7Y+5Z,2X+Y=Z,那么X:Y:Z的值是?