已知x,y满足条件｛x-y+5》0,x+y》0,x《3,｝求z=y-1/x+3 的最大值

已知x,y满足条件5x+3y 已知变量x,y满足条件{x 已知实数想x,y满足条件x-y+5>=0 x+y>=0 x y满足条件【x-y 设x、y满足条件x-y+5>=0,x+y>=0,x 当x,y满足条件|x|+|y| 当x,y满足条件|x|+|y| 已知x,y满足条件｛x-y+5》0,x+y》0,x《3,｝求z=y-1/x+3 的最大值 已知实数x、y满足条件x*+y*-4x+2y+5=0,求（9x+3y)的2008次幂*代表平方 当x,y满足条件x>=0,y 设X,Y满足条件x-y+2>=0,x+y-4>=0,2x-y-5 已知x,y满足y 已知x,y满足约束条件x-y+5>=0 x+y>=0 X 已知x,y满足x-y+5>=0,x+y>=0,x 已知X,Y满足约束条件x-y+5>=0 x+y>=0 X 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 已知X,Y满足条件X+2Y=0,求:函数W=X+Y的最大值 已知实数x,y满足条件{2x-y+1≥0,2x+y≥0,x≤1,求z=x+3y的最小值.