设x.y满足条件y>=0.X-Y+1>=0.x+y-3

设x.y满足条件y>=0.X-Y+1>=0.x+y-3 设x、y满足条件x-y+5>=0,x+y>=0,x 设X,Y满足条件x-y+2>=0,x+y-4>=0,2x-y-5 设x,y满足约束条件x+y>=1,x-y>=-1,2x-y 设x,y满足约束条件x+y>=1,x-y>=-1,2x-y 设实数x、y同时满足条件：4x^－9y^=36,且xy 设z=2y-2x+4,式中x,y满足条件a,0 设变量x.y满足条件3x+2y y满足条件【x-y 设变量x,y满足约束条件y>=0.x-y+1>=0.x+y-3 设变量x,y满足条件:x+y=-1 y>=1,则目标函数z=4x+2y的最大值为 若x,y 满足条件{x>=1 y>=1 x+y-3 当x,y满足条件x>=0,y 设方程组3x+y=k+1 x+3y=3的解xy满足条件0 设方程组3x+y=k+1 x+3y=3的解xy满足条件0 设i为虚数单位,若（x+i）(1-i=y)则实数x.y满足什么条件? 设Z=X+Y,其中X,Y满足X+2Y>=0,X-Y 设实数x,y满足x*x +(y-1)(y-1)=1,若对满足组条件的x,y,x+y+c≥0恒成立,则c的取值范围是.