题库网
#cff08d33-31ff-45db-8f18-81346f0cb487中等解答题抛物线直线与圆+圆锥曲线

25.已知抛物线y2=8xy^{2}=8x的焦点为FF,准线与xx轴的交点为CC,过点CC的直线ll与抛物线交于AABB两点,若AFB=CFB\angle AFB=\angle CFB,则AF=\vert AF\vert =[ 8 ].