若实数x,y满足{x-y+1≤0 x>0 x≤2 } 则y/x的取值范围是

若实数x,y满足{x-y+1≥,x>0},则y/(x-1)的取值范围是 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x−y+1≤0x＞0y≤2，则yx的取值范围是（　　） 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+y≤2,(x-1)²+(y-1)²≤2,则2x+y的取值范围是 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? 若实数x,y满足x^2+y^2-6x-4y+12=0,则x^2+y^2的取值范围是 1.若实数X,Y满足不等式组 y≥0 x-y≤4 2x-y-2≥0,则W=(y-1)/(x+1)的取值范围是? 若实数x,y满足x+y+1≤0,x≥0.则y/（x-1）的取值范围 设实数x,y满足y≥x+1,2x-4y-1≤0 ,2y+x-11≤0 则y²/x的取值范围是 设实数x,y,满足[(x^2)/16]+[(y^2)/9]=1,则[(y-4)/x](x≠0)的取值范围是? 若实数x，y满足x−y+1≤0x＞0则yx−1的取值范围是（　　）