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问题导引我们先以新老各种版本较为普遍选用的一个问题入手(为了准确起见,这里以人教B版的页码序号为例)选修2—1第48页例2(整个椭圆内容最末一道例题,也是学习圆锥曲线后面两类的思想方法范本)【选修1—1第40页例2】:在我国某卫星发射基地升空的“探测一号”赤道星,运行的轨道是以地球的中心为一个焦点的椭圆,其近地点与地球表面相距555km,远地点与地球表面相距74051km.已知地球半径约为
Problem Guidance Let us start with a question that is more commonly used in various versions of the old and the new (for the sake of exactitude, take the page number of the B-lesson as an example) Elective 2-1 Page 48 Example 2 (Ellipse last An example, but also a model of method of thinking behind the study of two types of conic.) [Elective 1-1 Page 40 Example 2]: In our country launched a satellite launch base “” No. "Equatorial Star, the orbit is The ellipse with the center of the earth as a focus has a perigee distance of 555km from the earth’s surface and a distance of 74051km from the earth’s surface