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1 本单元知识网络2 重点、难点、热点分析1)重点 :三种圆锥曲线的定义、标准方程、几何性质 (包括范围、轴、顶点、焦点、离心率、准线 ,对于双曲线还有渐进线 )及其应用 ;直线与圆锥曲线相交弦的中点轨迹问题 ;待定系数法、运动变化思想、数形结合思想的应用 .2 )难点 :运用
1 This Unit Knowledge Network 2 Key points, difficulties, and hotspot analysis 1) Emphasis: Definitions, standard equations, and geometric properties (including ranges, axes, vertices, focal points, eccentricities, alignments, and progressions for hyperbolic curves) of the three types of conic sections. Line) and its application; the midpoint trajectory of strings intersecting a straight line and a conic curve; the application of undetermined coefficient method, motion change ideas, and the combination of number and shape. 2) Difficulties: Application