立体图形中动点轨迹问题集立体几何、解析几何知识于一体,考查空间想象能力和代数推理能力,考查对图形运动变化规律的洞察力,是在知识的交汇处命题思想的充分体现,对思维的灵活性与深刻性要求较高,下面就这类问题的求解策略作些探讨.一、直接利用曲线的定义求解根据图形的变化规律,利用圆、球、圆锥曲线等 The problem of moving point trajectories in stereoscopic graphics is a combination of three-dimensional geometry and analytic geometry. Examining spatial imagination ability and algebraic inference ability, examining the insight into the regularity of the motion of graphics is the embodiment of propositional thinking at the intersection of knowledge. The flexibility and profound requirements of the higher, the following strategies for solving this type of problem to explore.First, the direct use of the definition of the curve according to the changing law of graphics, the use of the circle, the ball, the conic curve