1/x+1/y=1/2,1/y+1/z=1/3,1/x+1/z=1/6,求xyz/(xy+yz+xz)的值

已知 x/(y+z)+y/(z+x)+z/(x+y)=1求 (x*x)/(y+z)+(y*y)/(x+z)+(z*z)/(x+y)=? x+y+z=6 x+2y+3z=14 y+1=z 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 分式加减的几道题目求速度1 .(x+y)²/（x-z)(y-z) - (y+z)²/（x-z)(y-z) = 2.2x+3y/x-y+2y/y-x-3y/x-y= 1、y-x/x²-y²2、(x-y)(y-z)(z-x)/(z-y)(y-x)(x-z) 若|x+3|+|y-2|+|2×z+1|=0求(x×z-y×z)(y-x+z)的值 matlab解对数方程组[x,y,z]=solve('0.29744*x/(3+0.1*x+y+z)=(log10((3+x+y+z)/(3+0.1*x+y+z)))^2','0.79*x/(3+0.1*y+z)=(log10((3+x+y+z)/(3+0.1*x+y+z)*(3+y+z)/(3+0.1*y+z)))^2','1.25*x/(3+0.1*z)=(log10((3+x+y+z)/(3+0.1*x+y+z)*(3+y+z)/(3+0.*1y+z)*(3+z)/ X+2Y= -12X+Y+Z= 1-X+Y-Z= -1 X+y+z=26,x-y=1,2x-y+z=18 求X Y Z各代表什么数,使下列等式成立1、X+X+X=Y+Y；2、Y+Y+Y+Y=Z+Z+Z；3、X+Z+Y+Y=180 {x+y-z=11 y+z-x=5 z+x-y=1 {x+y-z=11,x-y-z=-5,x-y+z=1 {x+y+z=1;x+3y+7z=-1;z+5y+8z=-2 2|X-Y|+√2Y+Z+Z²-Z+1/4=0求X+Y+Z的值 x-z=-4 z-2y=-1 x+y-z=-1 怎么解 x+y+z=2,x-z=-2,y+z=1 {X+y+z=8,X一z=-2,y十z=1