论文部分内容阅读
高中数学人教版第二册(上)第119页有这样一道练习题:过抛物线y2=2px(p>0)的焦点F的一条直线AB与抛物线相交,两个交点的纵坐标为y1,y2,求证:y1y2=-p2.
High School Mathematics PEP II (on) p.119 There is such a practice: A line AB with focus F over a parabola y2 = 2px (p>0) intersects with a parabola, and the ordinate of the two intersections is y1. Y2, verification: y1y2=-p2.