若x2+y2+z2=(x+y+z)2,且x,y,z均不为零,则x+y+z/xyz=?
若x2+y2+z2=(x+y+z)2,且x,y,z均不为零,则x+y+z/xyz=?
已知x+y-z=0,2x-y-8z=0,且xyz不等于0,则x2+y2+z2/(xy+yz+zx)等于
因式分解X2(Y+Z)+Y2(Z+X)+Z2(X+Y)-(X3+Y3+Z3)-2XYZ
已知xyz=1,x+y+z=2,x2+y2+z2=16,求1/x+y+1/y+z+1/x+z
已知x,y,z∈R,且x+y+z=1,x2+y2+z2=3,则xyz的最大值是______.
已知X,Y,Z是实数,且X2+Y2+Z2=3,X+Y+Z=1,则XYZ最大值是
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/(
若正数x,y,z满足x+y+z=3,x2+y2+z2=9/2,则z的最大值为多少?(详解)
若正数x,y,z满足x+y+z=3,x2+y2+z2=9/2,则z的最大值为多少?(
已知xyz均为非负实数 且满足 x-y+2z=3 2x+y+z=3 求x2+y2+2z2的最大值和最小值
已知x2+y2+z2-2x+4y-6z+14=0,则x+y+z=______.