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抛物线焦点弦具有不少性质 ,均散见在各类书刊上 .本文将系统地归纳集中 ,以期对焦点弦的几条最主要的性质有一个更全面的、更深刻的了解 .从而进一步提高运用这些性质去解决相关问题的数学素质和应用能力 .( 1 )1 焦点弦 (通径 )的定义通过抛物线焦点的直线(不与抛物线对称轴
The parabola focal string has many properties, all scattered in various books and periodicals. This article will systematically sum up, in order to have a more comprehensive and in-depth understanding of the most important nature of the focus of the string, so as to further improve the use of These properties are to solve the mathematics quality and application ability of the related problems. (1) The definition of the focus of the chord (path) through the parabola focus of the line (without parabolic axis of symmetry