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圆是解析几何中既简单又重要的基本曲线.圆所涉及的问题很多,但以圆和与圆有关的轨迹方程问题、直线(圆)与圆的位置关系问题、最值问题、范围问题、圆与其他内容交汇问题为重点,而且也是高考的重点,因此,应该掌握这些问题求解的基本策略.1求圆和与圆有关的轨迹方程对于圆的方程
The circle is a simple and important basic curve in analytical geometry. The circle involves many problems, but the trajectory equation problem related to the circle and the circle, the positional relationship between the line (circle) and the circle, the problem of the maximum value, the range problem, The problem of the intersection of circles with other content is the focus, and it is also the focus of the college entrance examination. Therefore, it is necessary to grasp the basic strategies for solving these problems. 1 Find the circle and the trajectory equation related to the circle for the equation of the circle.