定义指出:除圆外,动点到定点的距离与到定直线距离之比,等于一个常数e(e>0),则动点的轨迹即为圆锥曲线,定点为焦点,定直线为对应焦点的准线。就其定义来说,很多学生都能记得,但要应用此定义解决实际问题时,绝大多数学生都感到很困难。主要是一般学生受解析法的思维定势的影响。意识在解析几何中,虽然主要是用代数方法,但也不排斥用 The definition states that except for the circle, the ratio of the distance from the fixed point to the fixed point is equal to a constant e (e>0). The trajectory of the moving point is the conic section, the fixed point is the focus point, and the fixed line is the corresponding focus. The guideline. For its definition, many students can remember, but when applying this definition to solve practical problems, the vast majority of students feel very difficult. The main reason is that ordinary students are influenced by the analytical thinking. Consciousness in analytical geometry, albeit mainly algebraic, does not exclude it.