若y,z均为质数,x=yz,且x、y、z满足1/x+1/y=3/z,则1998x+5y+3z=_____
若y,z均为质数,x=yz,且x、y、z满足1/x+1/y=3/z,则1998x+5y+3z=_____
一道初中代数题若y,z均为质数,x=yz,x,y,z满足1/x+1/y=3/z,则1998x+5y+3z等于多少?(选项
若实数x,y,z满足x+y+z=5,xy+yz+xz=3,求z的最大值
若有理数x,y,z满足√x+√y-1+√z-2=1/2(x+y+z) 确定(x-yz)^3
时数x,y,z满足x+y+z=5,xy+yz+zx=3,求Z最大值
已知x,y,z均不为0,且满足方程组{x+y-z=0,①2x-y-5z=0.②试求(2x+y+3z)/(3x-y-z)值
已知x,y,z均不为0,且满足方程组x+y-z=0,2x-y-5z=0试求2x+y+3z/3x-y-z
已知x.y.z均为实数且满足x+y+z=4.求xy+yz+xz的最大值.
若x,y,z均为实数,且(x-1)²+|y+2|+根号(z-3)²=0则x,y,z的值分别为?
已知X Y Z为非负有理数,且满足3X+2Y+Z=5,2X+Y-3Z=1,若S=3X+Y-7Z,求S的最大值和最小值
已知x,y,z为非负有理数,且满足3x+2y+z=5,2x+y-3z=1,若S=3x+y-7z,求S的最大值和最小值
数学求最小值和最大值已知X、Y、Z为非负有理数,且满足3x+2y+z=5,2x+y-3z=1,若有S=3x+y-7z,求