已知x.y满足(x-1)2+(y+2)2=4,求S=3x-y的最值

已知x,y满足约束条件：x-y+1>=0,x+y-2>=0,x 已知x,y 满足约束条件y>=2|x|,x+y-1 已知实数x,y满足y=|x-1|,则x+2y的最大值是 已知X和Y满足3X+4Y=2,X-Y-1/7 已知实数x,y满足y=|x-1|若x+2y 已知实数x.y满足(x+2)^2+y^2( 已知圆x,y满足x^2+y^2 已知实数x,y满足x-ay-1>=0,2x+y>=0,x 已知实数x,y满足(x+y)^2=1,(x-y)^2=25,求x,y的值 已知x,y满足y^4+2x^4+1=4x^2y,求x,y的值 已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y 已知X,Y满足|X-Y-1|+（X+Y-3)^2=0求X,Y的值 已知实数X,Y满足2 已知实数xy满足x+2y 已知实数xy满足 x+y-2 已知变量x,y满足约束条件x+2y-3=0,y-1 已知变量x,y满足约束条件x+2y-3=0,y-1 已知x,y满足x+y-2>=0,2x-y+2>=0,x