直线与圆锥曲线相交所得的弦中点问题,是平面解析几何的重点内容之一,也是高考的一个热点。其中有一种题型,给定定点时求以该定点为中点的弦所在直线的方程,求解时经常需要对判别式进行验证,而验证的过程,在教师出题时,会耗时降低出题的效率,在学生解题时,也会耗去学生两小时内的有效答题时间。针对此情况,下面我对此问题进行一下探讨,教师和学生 The intersection point of the straight line and the conic is the center point of the string, which is one of the key contents of the plane analytic geometry. It is also a hot point of the college entrance examination. One of the questions, given a given point to find the point of the string as the midpoint of the straight line equation, the solution often need to verify the discriminant, and the verification process, the teacher questions, it will take time to reduce the output The efficiency of the questions, when students solve problems, will also consume students within two hours of effective answer time. In view of this situation, I will discuss this issue below, teachers and students