高中数学:设实数x y满足条件1/2≤x≤1 y≥-x+1 y≤x+1 则(y+1)/x的取值范围
高中数学:设实数x y满足条件1/2≤x≤1 y≥-x+1 y≤x+1 则(y+1)/x的取值范围
设实数x,y满足{x-y-2≤0 x+2y-5≥0 y-2≤0.(1)求z=x+y的取值范围;(2)求u=(x+y)/x
设实数x,y满足约束条件x≥1且x≠2y≥1x+2y−5≤0,则z=x+y−1x−2的取值范围为( )
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?
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
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
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
设实数xy满足x+y-3≤0,y-x/2≥0,x-1≥0,则求u=y/x-x/y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
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≥,x>0},则y/(x-1)的取值范围是
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