论文部分内容阅读
高三复习时我们常常要求学生做题时能举一反三.通过一道题目把相关知识点串联起来,层层递进,以培养分析、综合、判断、推理的能力,教师在教学过程中应对各种类型的题目分析其特征,让学生明白,虽然题目是“变”的,但每种类型题的特征是“不变”的,我们只要能认清其特征,就能以不变应万变.例题已知数列{an}中,a1=1,an+1=3an+2n+1,求an.笔者在讲评此题时,把其中的3和2n+1这两个数字依次地作了改变,变成几道由易到
In the third year of the third year of high school, we often ask the students to give top priority to the questions.Through a series of related knowledge points in series, progressively, to develop the ability to analyze, synthesize, judge, reasoning, teachers in the teaching process to deal with various types of Subject analysis of its characteristics, so that students understand that although the title is “change ”, but the characteristics of each type of question is “unchanged ”, as long as we can recognize its characteristics, we can not change the million Example of the known sequence {an}, a1 = 1, an + 1 = 3an +2 n +1, seeking an. I comment on the title, the three figures and 2n + 1 these two figures in turn Change, into a few easy to come by