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一、内容和内容解析“用二分法求方程的近似解”是新课标人教A版《数学必修①》中新增的一节,教材安排这节内容的目的,一是使学生认识到“二分法”是求方程近似解的一种方法,加强函数与方程间的联系性,感悟函数与方程思想,深刻体会函数的应用.二是这部分内容可较好地体现逼近思想,为后续的算法学习作准备.重点是运用二分法求函数零点的近似值,形成用函数观点处理问题的意识.相应教参指出的难点是由于数值计算较为复杂,对获得给定精确度的近似解增加了困难,所以,教学中宜合理运用各种信息技术组织教
First, the content and content analysis “The dichotomy method to find the approximate solution ” is a new class teacher to teach A version of “Maths compulsory ①” in a new section, textbook arrangements for the purpose of this section, one is to enable students Realize that “dichotomy ” is a way to find the approximate solution to the equation, strengthen the connection between the function and the equation, sentiment function and the thought of the equation, deeply understand the application of the function.Secondly, this part can better reflect the approximation And make preparations for the follow-up algorithm learning.The emphasis is to use the dichotomy to find the approximate value of the function zero, and to form the consciousness of handling the problem with the function viewpoint.The difficulty pointed out by the corresponding teaching reference is that the numerical calculation is more complicated, Approximate solution increases the difficulty, so teaching should be reasonable use of a variety of information technology organizations teach