若实数x,y满足x-y+1≤0或x>0,则y/(x-1)的取值范围 谢谢.高中数学.

若实数x,y满足x-y+1》=0,x+y>=0,x 若实数x,y满足x-y+1>=0,x+y>=0,x 若实数x,y满足x-y+1≤0或x>0,则y/(x-1)的取值范围 谢谢.高中数学. 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, 若实数X,Y满足｛x-y+1小于0或x大于0｝,则y/x-1的取值范围是( ) 最好能画个图给我看, 实数x,y满足{x-y+1>=0;y+1>=0;x+y+1 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 已知实数x,y满足x-y大于等于0,x+y-1小于等于0已知实数x,y满足x-y大于等于0,x+y-1小于等于0,y+1大于等于0,若点P(x,y)在圆x^2+(y-1)^2=a(a大于0)的内部或圆上,则a最小值为 若实数x,y满足x+y小于或等于1 y小于或等于x y大于或等于0 则z=x-2y的最大值是多少? 若实数x,y满足{x-y+1≥,x>0},则y/(x-1)的取值范围是 若实数x满足条件x>=0,y 若实数x,y满足不等式组x>=0 ,y>=0,x+2y 若实数x,y满足x^2-xy-y^2 =0,则x/y=? 己知实数x,y满足{ (x-y+6) (x+y-6)>=0,1 已知实数x,y满足x-ay-1>=0,2x+y>=0,x 若实数x,y满足{x-y+1≤0 x>0 x≤2 } 则y/x的取值范围是 已知实数x,y满足{x=>0,y