圆锥曲线是解析几何中的重要部分,是高考中必考的难点内容,其特点是在坐标系的基础上,用坐标表示点,用方程表示曲线,通过代数运算处理几何问题.在进行计算的同时综合考虑几何因素,则能够简化运算,起到事半功倍的效果.下面谈谈应用平面几何解决圆锥曲线问题的几种情况.一、求斜率例1摇已知直线y=k(x+2)(k>0)与抛物线C:y2=8x相交于A、B两点,F为C的焦点,若|FA|=2|FB|,则k Conic curve analytic geometry is an important part of the college entrance examination will be difficult content of the test, which is characterized by the coordinate system based on the coordinates that point, with the equation that curve, through the algebraic processing geometric problems in the calculation At the same time taking into account the geometric factors, it can simplify the operation, play a multiplier effect. Here to talk about the application of planar geometry to solve the conic problem several situations. First, find the slope 1 known line y = k (x +2) (k> 0) intersects parabola C: y2 = 8x at points A and B, F is the focal point of C, and if | FA | = 2 | FB |