若x,y满足|x-1|+|y-1|≤2,则（x,y)表示的平面区域的面积为

若变量x,y满足约束条件{x>=-1;y>=x;3x+2y 若x.y属于R,且满足（X*X+Y*Y+2）（X*X+Y*Y-1）-18≤0.求证：XY≤2 若实数x,y满足约束条件x-y≥0,x+y≥0,2x+y≤1,则y/(x+1)的最大值是多少, 已知实数x,y满足y=|x-1|若x+2y 设x,y满足约束条件x+y>=1,x-y>=-1,2x-y 设x,y满足约束条件x+y>=1,x-y>=-1,2x-y 变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y 设变量x y满足约束条件x-y≥-1 x+y≥1 2x-y≤1 z=(x-2y)/(x+y)的最大值 整数x,y满足x^2+y^2+1≤2x+2y,求x+y的值 整数x,y满足不等式x^2+y^2+1≤2x+2y,求x,y的值 方程组2x+y=1-m...x+2y=2中,若未知数x,y满足x+y 若x,y满足|x-y+1|+(x+y+3)^2=0则x^2-y^2= 若x,y满足|2x-y-3|+|3x+2y+1|=0,则x= y= 若x,y满足|x-1|+|y-1|≤2,则（x,y)表示的平面区域的面积为 若变量x,y满足约束条件-1≤x:x≤y;3x+2y≤5,则z=2x+y的最大值为 若实数X,Y满足{ x-y-1≤0,x+y-3≤0,x≥1,则函数z=2x-y的最大值 若实数x,y满足x-4y+3≤0,3x+5y-25≤0,x≥1,则2x-y的最大值是多少 若变量x y满足约束条件x+y≤5 x-y≤-1 x≥0 则z=3x-2y的最小值