直线与圆锥曲线的关系问题,既是高考考查的重点,也是高中数学的难点.利用解析法解答时,往往因求交点而带来复杂的运算.本文通过例析介绍“设而不求”法在解决以下常见的六类问题中的运用.1相交弦问题例1过点A(2,1)的直线与双曲线x2-y22=1交于P1,P2两点,求弦P1P2的中点P的轨迹方 The relationship between the straight line and the conic curve is not only the focus of the college entrance examination, but also the difficulty of high school mathematics. When using the analytical method to solve, it often leads to complex operations due to the intersection point. This article analyzes and describes the “set without seeking” method. Solve the following common six kinds of problems in the use of. 1 Intersecting string problems Example 1 Over the point A (2,1) of the straight line and hyperbole x2-y22 = 1 intersection in P1, P2 two points, find the midpoint P1P2 P Trajectory side