开拓解析几何中定值问题的思路与方法,可以增强领悟能力,博采众长,从而减少盲目性.解题中的灵感突现,源自平时的日积月累,只有多钻研,多探索,做题时便能随机应变,或独辟蹊径,以致迎刃而解.现总结定长问题、定点在圆或直线上的问题加以探究分析.一、定长问题例1已知椭圆的中心为坐标原点,短轴长为2,一条准线 Exploring the ideas and methods of setting values ​​in analytic geometry can enhance the ability to comprehend and draw upon others so as to reduce blindness. Inspiration in problem solving emerges from time to time and can only be adaptable when it is explored and explored. , Or unique, so easily solved.Now summarizes the problem of fixed-length, fixed-point in the circular or straight line to explore the problem analysis First, the fixed-length problem Example 1 Known elliptic center of the origin of coordinates, the minor axis length of 2, a quasi-line