实数x,y满足4x+3y>=0表示直线4x+3y=0右侧动点M(x,y)的区域Ωu=x^2+4x+y^2-2y=(x+2)²+(y-1)²-5令A(-2,1),点A不在Ω内|MA|²=(x+2)²+(y-1)²过点A向区域Ω的边界线4x+3y=0做垂线垂足为B,则|AB|...