若xyz适合x+y=6,z方=xy-9,则z=?
若xyz适合x+y=6,z方=xy-9,则z=?
已知实数xyz适合x+y-6=0.z方-xy+9=0,则z?
若xy-z不等于0,且(y+x)/x=(z+x)/y=(y+x)/z,求[(y+z)(z+x)(x+y)]/xyz的值?
若x,y,z适合x+y=6,z^2=xy-9,则的值是
若x+y+z=6,xy+yz+zx=11,x^3+y^3+z^3-3xyz
已知xy/5=y+z/6=z+x/7,且xyz不等于0,求x:y:z
已知实数x,y,z适合x+y=6,z2=xy-9,则z=( )
已知xyz为实数,且满足x+y=6,z^2=xy-9,z=()
已知4x-3y-6z=0,x+2y-7z=0(xyz不等于0)则2x方+3x方+6x方/x方+5y方+7z方的值为( )
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
若xyz不等于0,且(y+z)/x=(z+x)/y=(x+y)/z,求(y+z)(z+x)(x+y)/xyz的值?
已知:(x+y)/z=(x+z)/y=(z+y)/x,且xyz不等于0,则分式(x+y)(x+z)(z+x)/xyz的值