设:M点坐标为(x,y)
根据点斜式则有:(y-0)/(x+3)*(y-0)/(x-3)=-4/9 (x≠3,x≠-3)
据上式化简得:x^2/3^2+y^2/2^2=1 (x≠3,x≠-3)
另:(点M的轨迹为去掉(-3,0)和(3,0)点的椭圆)
设:M点坐标为(x,y)
根据点斜式则有:(y-0)/(x+3)*(y-0)/(x-3)=-4/9 (x≠3,x≠-3)
据上式化简得:x^2/3^2+y^2/2^2=1 (x≠3,x≠-3)
另:(点M的轨迹为去掉(-3,0)和(3,0)点的椭圆)