若x,y满足(x-1)^2+(y+2)^=4,求S=2x+y的最大值和最小值

若变量x,y满足约束条件{x>=-1;y>=x;3x+2y 已知实数x,y满足y=|x-1|若x+2y 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 变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y 方程组2x+y=1-m...x+2y=2中,若未知数x,y满足x+y 若x,y满足|x-y+1|+(x+y+3)^2=0则x^2-y^2= 若x,y满足|2x-y-3|+|3x+2y+1|=0,则x= y= 若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值 若x.y满足x+=4和x-y=2,求xy分之2x-y+1除以-x分之y+y分之x的值 已知x,y满足约束条件：x-y+1>=0,x+y-2>=0,x 若x,y满足y 若关于x y的二元一次方程组2x+y=2m-1 x+2y=m满足x+y>0和x-y 若关于x,y的二元一次方程组x+2y=m-1,2x+y=m+1的解x,y满足x>0,y 若关于x,y的二元一次方程组x+2y=m-1,2x+y=m+1的解x,y满足x>0,y 若实数X,Y满足X²+Y²+4X-2Y +1=0,则X²-6X+Y²-2Y的最大值是多少 若x.y属于R,且满足（X*X+Y*Y+2）（X*X+Y*Y-1）-18≤0.求证：XY≤2 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,