多种角度探究椭圆的焦半径、焦点弦、∠F1PF2的最大值问题The Maximum of Focal Radius, Chord of Focus and Angle ∠F1PF2 of Ellipse Are Studied from Different Angles
刘 越, 徐冬冬 下载量: 395 浏览量: 1,028
理论数学 Vol.10 No.11, November 18 2020, PDF, HTML, XML DOI:10.12677/PM.2020.1011128 被引量