不等式数学题当x,y满足条件x>=0,y

不等式数学题当x,y满足条件x>=0,y 当x,y满足条件x>=0,y 当x,y满足条件|x|+|y| 当x,y满足条件|x|+|y| 高二数学题:若实数x,y满足不等式x-y>=0 x+y>=0 x 已知x,y满足不等式组,x>=0,y 当x,y满足条件|x|＋|y| 当x,y满足条件|x-1|+|y+1| 当X,Y满足条件绝对值X+绝对值Y 当x,y满足条件|x+3|+|y-2| 高二数学题-不等式的证明设实数x,y满足y+x^2=0,0 y满足条件【x-y 当x,y满足不等式组：x≥0；y≤x；2x+y-9≤0,目标函数z=x+3y的最大值为? 设x、y满足条件x-y+5>=0,x+y>=0,x 当自变量x的取值满足什么条件时,函数y=3x+8的值满足y=-7,y>0 y 线性规划 当x.y满足x>=0,y 已知x、y满足不等式组 x>=0 y>=0 x+y 若实数x,y满足不等式组x>=0 ,y>=0,x+2y