已知||x|-|y||≤1,z=x^2+y^2-6x-2y+10,求z的取值范围?
已知||x|-|y||≤1,z=x^2+y^2-6x-2y+10,求z的取值范围?
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
若x,y,z,满足3x+2y+z=5,2x+y-3z=1.y是非负数.求z的取值范围
已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z.
已知实数 X小于等于Y小于等于Z,且满足:3Y+2Z=3+X,3Y+Z=4-3X,(1)求X的取值范围;(2)求X+Y+
已知x^3+y^3-6x+2y+z+3+10=0,求(x-y+z)(x+y-z)的值.(z+3)是绝对值
已知x,y,z满足x+y+2z=1,x²+y²+6z+1.5=0,求x,y,z的值
1.x+y+z=30,3x+y-z=50,x,y,z为非负数,求5x+4y+2z取值范围.
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
设变量x,y满足约束条件{x-y≥0,x+y≤1 x+2y≥1 求z=y/x+1的取值范围 z=(x-1/2)^2+y^
已知实数x,y,z满足以下条件,求x的取值范围.x+y+z=a,x2+y2+z2=1/2 a2
已知x,y,z是三个非负有理数,且满足3x+2y+z=5,x+y-z=2,若S=2x-y-z,求s的取值范围