已知x+1/y=4,y+1/z=1,z+1/x=7/3,求xyz的值

已知实数x、y、z满足x+1/y=4,y+1/z=1,z+1/x=7/3,求xyz的值 x+y+z=1 求xyz/(x+y)(y+z)(z+x)的最大值 已知实数xyz满足x/y+z+y/z+x+z/x+y=1求x^2/y+z+y^2/z+x+z^2/x+y的值 已知xyz满足x+y+z=30,3x+y-z=50,设t=5x+4y+2z 1当t=40时,求xyz的值 2若xyz均为 已知XYz满足|X-Y|/4+z^2-z+1/4+根号2y+z=0,求(y+z)的值. 已知x、y、z、是正实数,且x+y+z=xyz,求1/(x+y)+1/(y+z)+1/(x+z)的最大值. 已知实数xyz满足|x-2y|+2√(2y+z)+z-2z+1=0,求x+y+z的值 已知x+1/y=4,y+1/z=1,z+1/x=7/3,求xyz的值 已知xyz=1,求x/(xy+x+1)+y/(yz+y+1)+z/(xz+z+1)的值 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-3)的绝对值加(y-1)的2次方+(z+1)的绝对值=0,求(x-y)(y-z)(z-x)分之xyz 数学题已知xyz≠0,且x+y+z=1,x²+y²+z²=1,求1/x+1/y+1/z的值