不等式 已知x,y,z均为非零实数,x+y+z=30,3x+y-z=50 则M=5x+4y+2z取值范围是
不等式 已知x,y,z均为非零实数,x+y+z=30,3x+y-z=50 则M=5x+4y+2z取值范围是
若x+y+z=30,3x+y-z=50,x,y,z都为非负实数,则M=5x+4y+2z的取值范围是______.
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=30,3x+y-z+50,x.y.z皆为非负数,求m=5x+4y+2z的取值范围.
若X+Y+Z=30,3X+Y-Z=50,X,Y,Z均为非负数,求M=5X+4Y+2Z,m的取值范围.
若x+y+z=303x+y−z=50,x、y、z均为非负整数,则M=5x+4y+2z的取值范围是( )
若x+y+z=30,3x+y-z=50,x、y、z皆为非负数,求M=5x+4y+2z的取值范围.
已知x,y,z为非零实数,且满足x+y-z/z=y+z-x/x=z+x-y/y 求x+y+z/z的值
若X+Y+Z=30,3X+Y-Z=50 ,且x、y、z均为非负数,则M=X-Y-Z的取值范围:
已知x,y,z,为非零实数,代数式x/|x|+y/|y|+z/|z|+|xyz|/xyz的值组成的集合M=______
已知x,y,z为非负实数,且满足x+y+z=30,3x+y-z=50.求u=5x+4y+2z的最大值和最小值.
已知x,y,z为实数,且x+y+z=5,xy+yz+zx=3,则z的取值范围为 ______.