解析几何就是用代数方法来研究几何问题，主要有两大任务：一是根据曲线的几何条件，把它用方程的形式表示出来；二是通过曲线的方程来讨论它的几何性质．因此处理解析几何问题，不仅要理解和掌握解析几何自身的概念和计算公式，如两点间的距离、直线的斜率、圆锥曲线的准... Analytic geometry is the use of algebraic methods to study geometric problems, there are two major tasks: First, according to the geometric conditions of the curve, it is expressed in the form of equations; Second, through the equation of the curve to discuss its geometric properties. So to deal with analytical geometry problems, not only to understand and grasp the concept of analytical geometry and calculation formulas, such as the distance between two points, the slope of the straight line, the conicity of the quasi...