已知实数x,y,z满足:xyz不等于0,2x+3y-13z=0,x-2y+4z=0,求(x^2+y^2-z^2)/(xy
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/05/16 08:26:45
已知实数x,y,z满足:xyz不等于0,2x+3y-13z=0,x-2y+4z=0,求(x^2+y^2-z^2)/(xy-yz+zx)
已知实数x,y,z满足:xyz≠0,2x+3y-13z=0,x-2y+4z=0,求(x^2+y^2-z^2)/(xy-yz+zx)的值.
在线等
已知实数x,y,z满足:xyz≠0,2x+3y-13z=0,x-2y+4z=0,求(x^2+y^2-z^2)/(xy-yz+zx)的值.
在线等
解方程组:
2x+3y-13z=0
x-2y+4z=0
得:
x=2z,y=3z
(x^2+y^2-z^2)/(xy-yz+zx)
=(4z^2+9z^2-z^2)/(6z^2-3z^2+2z^2)
=12z^2/5z^2
=12/5
2x+3y-13z=0
x-2y+4z=0
得:
x=2z,y=3z
(x^2+y^2-z^2)/(xy-yz+zx)
=(4z^2+9z^2-z^2)/(6z^2-3z^2+2z^2)
=12z^2/5z^2
=12/5
已知实数x,y,z满足:xyz不等于0,2x+3y-13z=0,x-2y+4z=0,求(x^2+y^2-z^2)/(xy
已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值
已知xyz满足|3x-2y+z|+|2x+y+2z|=0(xyz不等于o)求x+y除以z
已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少
方程组:x-2y+4z=0,2x+3y-3z=0...xyz不等于0,求(2x+y-z)\(2x-y+z)
已知实数x,y,z满足x²-6xy+10y²+4y+|z²-3z+2|+4=0,求(x+y
已知x+y-7z=0 x-2y+5z=0(xyz不等于0),求x+2y-z/y-2x+12z
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.
已知有实数x,y,z满足x^2+4y^2+z^2-2x-12y+4z+14=0,求xyz的值.
已知实数xyz满足|x-2y|+2√(2y+z)+z-2z+1=0,求x+y+z的值
已知x+y-z/z=x-y+z/y=-x+y+z/x,且xyz不等于0,求分式[(x+y)(x+z)(y+z)]/xyz
已知XYZ满足方程组 X+Y-Z=6 Y+Z-X=2 Z+X-y=0 求X Y Z的值