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本文针对高中数学“对数概念”一节,从数学发展和学科知识两个角度创设问题情境,同时阐述了对数的符号意识,以求学生对对数的概念有一个完整的认识.一、基本理念苏教版普通高中数学课程教科书数学必修1把对数一节安排在指数之后,对对数定义如下:一般地,如果a(a>0,a≠1)的b次幂等于N,即a~b=N,那么称b是以a为底N的对数.其中a叫做对数的底数,N叫做对数的真
In this paper, a high school mathematics “logarithmic concept ” section, from the mathematical development and the creation of two issues of subject knowledge from the perspective of the problem, at the same time elaborated the symbolic awareness of the logarithm, so that students have a complete understanding of the concept of logarithm. First, the basic idea Sujiao version of high school mathematics textbooks math compulsory 1 logarithmic section arranged in the index, the logarithm is defined as follows: In general, if a (a> 0, a ≠ 1) b power is equal to N, that is, a ~ b = N, then called b is the logarithm of a base N, where a is called the base of the logarithm, N is called the real logarithm