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直线与圆锥曲线的位置关系是高中平面解析几何的核心问题,是高考的重点,热点和难点.对直线与圆锥曲线的位置关系问题,教师们投入了成倍课时,设计了复习专题,强化了考试练习.学生们倾注了大量学时,经历了艰难思路,进行了繁杂运算,但教学效果却大失所望.主要原因是缺乏算理,导致
The positional relationship between straight lines and conic curves is the core problem of high-medium plane analytical geometry, which is the focus, hot spot, and difficult point of the college entrance examination. For the positional relationship between straight lines and conic curves, teachers have devoted double time, designed the review topics, and strengthened Exam exercises. Students devoted a lot of school hours, experienced difficult ideas, and carried out a variety of calculations, but the teaching results were disappointing. The main reason was the lack of reason, leading to