已知抛物线C:y2=2px的焦点坐标F(2,0),过F的直线l交抛物线C于A,B两点...答:F(2,0)p=4 y^2=8x,a>0,b>0,d>0,e>0 A(2a^2,4a),B(2b^2,-4b),D(2d^2,-4d),E(2e^2,4e)a=b,d=e k(AB):k(DE)=1 a≠b k(AB)=2/(a-b),k(DE)=2/(e-d)k(AB)=4a/(2a^2-2)=-4b/(2b^2-2)ab=1...(1)k(AD)=4a/(2a^2-1)=-4d/(2d^2-1)2...