XYZ(X+Y+Z)=1 求(x+y)(x+z)的最小值(X>0,Y>0,Z>O)
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
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?
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?
用均值不等式解题若x>0,y>0,z>0,且xyz(x+y+z)=1,求(x+y)(y+z)的最小值
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=1 求xyz/(x+y)(y+z)(z+x)的最大值
若x+y+z=0且xyz不等于0,求x(1/y+1/z)+y(1/x+1/z)+z(1/x+1/y)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
设X+Y+Z=0求X^3+X^2Z-XYZ+Y^2Z+Y^3的值
x*x+y*y+2z*z-2x+4y+4z+7=0,求xyz的值
已知x、y、z为实数,且x+y+z=0,xyz=2.求|x|+|y|+|z|的最小值