在解析几何学习中,经常遇到一些求变量取值范围的问题,有些同学注重技巧,其实解决问题应强调基本思路,关注本质特征.解析几何的研究对象是几何图形,研究方法是代数.面对确定参变量的解析几何问题,要集中精力观察、把握参变量对几何结构的影响和代数性质,明确特征,建立逻辑的起点,按照规 In analytical geometry learning, we often encounter problems in finding the range of values ​​of some variables. Some students pay attention to the skills. In fact, we must emphasize the basic ideas and focus on the essential characteristics in solving problems. The research object of analytic geometry is geometric figures. The research method is algebra. To determine the analytical geometry of a parametric variable, it is necessary to focus on observing and grasping the influence of the parametric variable on the geometric structure and the nature of algebra, clarifying the characteristics, establishing the logical starting point, and following the rules.