x/2=/y3=z/4 x+y+z=18紧急!
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x/2=/y3=z/4 x+y+z=18紧急!
x+y+z=0求 x3+y3+z3=?
因式分解:x3(y-z)+y3(z-x)+z3(x-y)=
已知x,y,z是正实数,且x-y=-2,y3-z3-y2-yz-z=0,求x-z的值
x-4y+z=-302x+y-z=18x--y-z=7
x+y/2=z+x/3=y+z/4 x+y+z=27
x+2y=3x+2z=4y+z 求x:y:z
若x,y,z成等差数列,则(z-x)^2-4(x-y)(y-z)=
(x*x+2)(y*y+4)(z*z+8)=64xyz,求x,y,z
已知x+y+z=2,x2+y2+z2=12则x3+y3+z3=
已知x+y+z=2,x2+y2+z2=12则x3+y3+z3=
为什么(y3/z+z3/x+x3/y)(yz+zx+xy)>=(y2+x2+z2)2
1.X+Y+Z=6X+2Y+3Z=12182.X+Y=2572X×2=96Y3.X+Y=682X+4Y=208
(x+y-z)(x-y+z)=
2x+z=10 x+y-z=4 3x-y-z=0
用行列式的性质证明:y+z z+x x+y x y z x+y y+z z+x =2 z x y z+x x+y y+z y z x 这个怎么证?
(x-2y+z)(x+y-2z)分之(y-x)(z-x) + (x+y-2z)(y+z-2x)分之(z-y)(x-y) + (y+z-2z)(x-2y+z)分之(x-z)(y-z)=?第三部分那个是 (y+z-2x)(x-2y+z)分之(x-z)(y-z)
如果x/2=y/3=z/4,且x+y+z=18,那么x+y-z=?