若x,y满足1≤x+y≤3与-1≤x-y≤1,则x方加y方的取值范围?
设x、y满足约束条件{x≥0 y≥x 4x+3y≤12}则2y+3/x+1的取值范围是?
(x方加y方加1)(x方加y方加3)=8则x方加y方的值为
已知实数xy满足x方+y方=1求y+2/x+1的取值范围
x方+y方+xy=1 求x-2y的取值范围
实数x,y满足x+y≤2,(x-1)²+(y-1)²≤2,则2x+y的取值范围是
满足约束条件x-y≥-1,x+y≤3且x、y非负的Z=x-2y的取值范围?
实数x,y满足x+2y-1≤0,x≥0,y≥0,则绝对值2x+y-1的取值范围
若x、y满足约束条件x-y≥-1,x+y≤3,x≥0,y≥0,则z=x-2y的取值范围
若实数x,y满足x+y+1≤0,x≥0.则y/(x-1)的取值范围
已知变量xy满足约束条件x≥-1,y≥x,3x+2y≤5,则2x+y的取值范围是
若实数x,y满足2x*X+3y*y=1,S=3x*x-2y*y,则S的取值范围为
若实数x,y满足x−y+1≤0x>0y≤2,则yx的取值范围是( )