设A(x1,y1),B(x2,y2)是椭圆上关于y=4x+m对称的两点.P(x0,y0)为AB的中点.则 (y2-y1)/(x2-x1)=-1/4,y0=4x0+m由于 3x1²+2y1²=6 (1)3x2²+2y2²=6 (2)(2) -(1)得 3(x2-x1)(x1+x2)...