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本文以人教A版高中数学必修1中的“用二分法求方程的近似解”为例,探讨如何吃透教材各好课,请大家批评指正.一、吃透教材的四个视角1.理清教材编写的结构体系按功用划分教材段落,梳理编者的逻辑思路.对于“用二分法求方程的近似解”这节教材来说,编者写了六段文字:第一段,提出一个思考,相当于问:公式法有局限性,它不能解任意一个一元方程,那常规方法是什么,能否利用刚学的函数零点概念来解?第二段,通过具体例子“求函数f(x)=lnx+2x-6
In this paper, people teach A version of high school mathematics compulsory 1 ”use dichotomy to find the approximate solution “ as an example, to explore how to thoroughly digest textbooks, please criticize the correction. To clarify the structural system of textbook compilation by function of the division of textbooks, combing the editors of the logical train of thought.For the ”bisection method to find the approximate solution to the equation" textbook, the editor wrote six paragraphs: The first paragraph A thought, which is equivalent to asking: formula law has its limitations, it can not solve any one of a unary equation, what is the conventional method, can we use just learning function zero concept to solve the second paragraph, through the specific example f (x) = lnx + 2x-6