若x²-4x+y²+6y+√z-3 +13=0,求(yz)^x的值
若x²-4x+y²+6y+√z-3 +13=0,求(yz)^x的值
已知3x-4y-z=0 2x+y-8z =0,求(x²+y²-z²)/(xy+yz)的值
已知x/3=y/4=z/6,求(xy+yz+xz)/(x²+y²+z²)
若x/2=y/3=z/4,求(xy+yz+zx)/(x²+y²+z²)的值.
已知x:y:z=3:4:6,求xy+yz+xz / x^+y^+z^ 的值?
若|x-3|+|y+z|+|2z+1|=0,求xy-yz的值
已知x/3=y分/4=z/5≠0求(3x²+4y²+5z²)/(xy+xz+yz)的值,
已知2x-y-5z=0,x-2y+2z=0,求x²+y²+z²/xy+yz+zx的值.
若x/3=y=z/4,且xy+xz+yz=76,求2x*x+12y*y+9z*z的值
已知4x-3y-3z=0,x-3y-z=0 求xy+2yz/x²+y²+z²
已知4x-5y+2z=0,x+4y-3z=0,求(x²+y²+z²)/xy+yz+xz
已知x-y=1/2+√3,y-z=1/2-√3,求x²+y²+z²-xy-xz-yz的值