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:
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:
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.
1.x+y+z=30,3x+y-z=50,x,y,z为非负数,求5x+4y+2z取值范围.
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=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都为非负实数,则M=5x+4y+2z的取值范围是______.
已知x,y,z为非负数,且3x+2y+z=5,2x+y-3z=1.若S=3x-y-7z,试求S的取值范围
若x+y+z=30,3x+y-z=50,x,y,z均为非负数,且m=5x+4y+2z,试求m的最大值与最小值.
已知x,y,z均为非负数,且满足x+y+z=30,3x+y-z=50 1.用含x的式子分别表示y和z,则y=( ),z=
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( )
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2x+y-3z=1,3x+2y+z=5,x、y、z都是非负数,设m=3x+y-7z,求m的取值范围.