解答解析几何应用问题,首先要认真审题,把实际问题数学化,通过建立适当的坐标系,用解析几何的思想和方法给予解答.一、“声速”问题例1某中心接到其正东、正西、正北方向三个观测点的报告:正西、正北两个观测点同时听到一声巨响,正东观测点听到巨响的时间比其他两个观测点晚,已知各观测点到中心的距离都是1020m,试确定该巨响的位置(假定当时声音传播的速度为340m/s,各相关点均在同 Solve the problem of analytic geometry, we must first serious examination, the actual problem of mathematical, through the establishment of an appropriate coordinate system, using analytic geometry ideas and methods to give answer. East, west, north of the three observation points of the report: Zhengxi, two points north of Zhengbei heard a loud noise at the same time listening to loud noise at the observation point than the other two observation points, has been Know each observation point to the center of the distance is 1020m, try to determine the location of the loud noise (assuming the speed of sound was 340m / s, the relevant points are the same