已知x,y,z满足 -------------- + --------------- + ------------- =
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/(
已知x、y、z满足方程组:x+y-z=6;y+z-x=2;z+x-y=0 求x、y、z的值
已知三个正整数x,y,z满足x+y+z=xyz,且x
已知x,y,z为实数,满足x+2y-z=6x-y+2z=3
已知实数x,y,z,满足那么x+y=6,z^2=xy-9,求(x+y)^z
已知x,y,z满足方程组x+2y-z=21 x-y+2z=12
已知x,y,z满足方程组
已知三个数x,y,z满足
已知x,y,z满足方程组{x+y-z=6{y+z-x=2{z+x_y=0,求x,y,z的值
已知正数x,y,z满足5x+4y+3z=10
一条分式数学题已知x y z满足x/x+y + y/z+x + z/x+y =1,求x²/x+y + y&su