论文部分内容阅读
在数学教育中,我们常为了学生“解一题而不会通一片”的问题感到困扰,那么问题出在哪里呢?经过几番思考和实践,发现问题出在讲题的环节上.讲典型例题时要抓牢“浅入、联系、研透、回首”四个环节,力争环环紧扣,层层推进,让学生有“俯瞰众题终有辙”之感悟.我们称讲题的四个环节为“八字方针”.下面不妨以解析几何中一个常见题型展开“八字方针”的开讲设想.题型已知椭圆E:x/28+y/24=1的左焦点为F,左准线l与x轴的交点是圆C的圆心,圆C恰好经过坐标原点O,设G是圆C上任意一点.(1)求圆C的方程;
In mathematics education, we often feel uncomfortable with the problem of “solving one problem without passing through one”. After several pondering and practicing, we found that the problem lies in the topic. When talking about typical examples, we should grasp the four points of “shallowness, connection, researching, looking back” and strive to be closely linked to each other and promote them at all levels so that students will have the feeling that “overlooking the public topics is the ultimate goal.” We call the title of the four links for the “character guideline.” Here may wish to analyze a common geometry questions in the open "Homophobia The left focus of 24 = 1 is F, the intersection of left alignment l and x axis is the circle center of circle C, the circle C just passes through coordinate origin O, and G is any point on circle C. (1) Find the equation of circle C;