x^2+y^2-z^2=0的图像怎么画?

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x^2+y^2-z^2=0的图像怎么画?
已知x,y,z,同时满足方程x+3y-5z=0,2x-y-3z=0求x:y:z的值

由x+3y-5z=0得x=5z-3y代入2x-y-3z=0中,得10z-6y-y-3z=07z=7y∴y=z代入x=5z-3y中得x=5y-3y=2y∴x=2y于是x∶y∶z=2y∶y∶y=2∶1∶1

已知x+y-z=0,2x-y+2z=0 求(3x-2y+5z)/(5x-3y+2z)的值

由x+y-z=0,2x-y+2z=0可得:z=-3xy=-4x则3x-2y+5z/5x-3y+2z=3x+8x-15x/5x+12x-6x=-4x/11x=-4/11

已知x/2=y/3=z/4,且x+y+z不等于0,求2x+3y-4z/x+y+z的值

x/2=y/3=z/4=kx=2k,y=3k,z=4k2x+3y-4z/x+y+z=(4k+9k-16k)/(2k+3k+4k)=-1/3再问:确定?

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

x+y-z=6y+z-x=2z+x-y=0三式相加得x+y+z=8-得2z=2z=1-得2x=6x=3-得2y=8y=4x=3y=4z=1

已知{3x+4y+5z=0,2x+3y-4z=0,求x+y+z/x-y+z的值.

哇,这个很复杂啊再问:你会吗?

已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z的值.

将Z当成已知数,将X、y用Z来表示2x+3y-4z=03x+4y+5z=0整理得:2x+3y=4z3x+4y=-5z变成二元二次方程解之得:x=-31zy=22z代人x+y+z/x-y+z=2/13

已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/x-y+z的值.

2x+3y=4z(A式),3x+4y=-5z(B式)A*3-B*2:y=22zA*4-B*3:x=-31z(x+y+z)/(x-y+z)=(-31z+22z+z)/(-31z-22z+z)=2/13

设X+Y+Z=0求X^3+X^2Z-XYZ+Y^2Z+Y^3的值

因为:X+Y+Z=0得:Z+Y=-X------(1)X+Y=-Z------------(2)Z+Y=-X------------(3)X^3+X^2Z-XYZ+Y^2Z+Y^3=X^3+XZ(X+

已知x+4y+3z=3x-2y-5z=0,求x+2y-z/2x-3y+7z的值

x+4y+3z=3x-2y-5z=0则x+4y+3z=0①3x-2y-5z=0,则6x-4y-10z=0②①②两式相加,得7x-7z=0,所以x=z代入①,得z+4y+3z=0,所以y=-z所以x+2

已知2x+2y-4z=0,2x+4y+5z=0,求x+y+z/x-y+z的值

本题不一定要算出x、y,也能解出.(1)2x+2y-4z=0(2)2x+4y+5z=0(2)-(1):2y+9z=0即2y=-9z(1)÷2可得:x+y=2z故x+y+z=3z则x-y+z=(x+y+

4x-3y-6z=0,x+2y-7z=0是一个方程组,那么x-y+z/x+y+z的值等于

1/3再问:过程再答:4x-3y-6z=0(1)x+2y-7z=0(2)(2)×4-(1)得11y-22z=0即y=2z(3)(1)×2+(2)×3得11x-33z=0即x=3z(4)将(3)、(4)

已知有理数x,y,z满足|x-z-2|+|3x-6y-7|+(3y+3z-40)^2=0,求x,y,z的值

|x-z-2|+|3x-6y-7|+(3y+3z-40)^2=0x-z-2=0,3x-6y-7=0,3y+3z-40=0x=11,y=13/3,z=9

已知xyz不等于0,且x+2y-z=0,7x-y-z=0,求x+y+z/2x-y-z的值.

因为x+2y-z=0,7x-y-z=0两式相减,得:6x-3y=0,所以y=2x代入x+2y-z=0中,得:x+4x-z=0,那么z=5x那么(x+y+z)÷(2x-y-z)=(x+2x+5x)÷(2

已知实数x,y,z满足关系式2x-3y-z=0,x-2y+z=0,求x比y比z的值

2x-3y-z=0..(1)x-2y+z=0...(2)(1)+(2):3x-5y=03x=5yy=3/5x将y=3/5x代入(1)z=2x-3y=2x-3*3/5x=x/5x:y:z=x:3/5x:

已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值

4x-3y+z=0(1)x+2y-8z=0(2)(1)-(2)×4得-11y+33z=0∴y=3z把y=3z代入(2)得x=2z把x=2z,y=3z代入x+y-z/x-y+2z得原式=(2z+3z-z

已知x.y.z满足方程组x+2y-4z=0 2x+y-5z=0 求x:y:z的值

x+2y-4z=0①2x+y-5z=0②①*2-②:y=z③③代入①:x=2zx:y:z=2:1:1

x*x+y*y+2z*z-2x+4y+4z+7=0,求xyz的值

x*x+y*y+2z*z-2x+4y+4z+7=0(x*x-2x+1)+(y*y+4y+4)+2(z*z+2z+1)=0(x-1)^2+(y+2)^2+2(z+1)^2=0x=1,y=-2,z=-1x

若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值

令a=x/2=y/3=z/4则x=2a,y=3a,z=4a所以原式=(2a+3a+4a)/(2a+3a-4a)=9a/a=9

2x+3y-4z=0,3x+4y+5z=0,求x+y-z/x-y+z的值

2x+3y-4z=0,3x+4y+5z=0两式把z看作已知,可解得x=-31zy=22z(x+y-z)/(x-y+z)=(-31z+22z-z)/(-31z-22z+z)=5/26