已知实数x,y满足,X-2y≥-4,3x-2y≤12,x+y≥2,则y/(x+1)的取值范围
已知实数x,y满足{x≧0 y≧x 4x+3y≦12}.z=2y+3/x+1 的取值范围
已知实数x,y满足x>0,y>0,且2x-y≤0,x-3y+5≥0,则z=(1/4)^x(1/2)^y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?
已知实数x,y满足条件x≥0,y≥x,3x+4y≤12,则(x+2y+3)/(x +1)的最大值是
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
实数X.Y满足X*X+Y*Y-2X-2Y+1=0,则(Y-4)/(X-2)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
已知实数x,y满足x^2+y^2-6x-8y+24=0,则3x+4y-10的取值范围是
已知实数x,y满足x-y+2≥0且x+y-1≤0且x+2y+2≥0,则2x+y的取值范围为
已知实数x,y满足(x-y+6)(x+y-6)≥0,1≤x≤4,(1)求x^2+y^(2)-2的取值范围,(2)求y/(
若实数x y满足约束条件x≤2 y ≤2 x+y≥2 则x+2y的取值范围
实数x,y满足x≥2y≥2x+y<6则x+3y的取值范围是( )