论文部分内容阅读
函数零点个数问题是高中数学中的常见问题,在各类考试中经常出现.这类问题的解决不仅涉及到基本的数学知识,还涉及到基本数学思想方法,比如化归思想,数形结合,整体代换等等.笔者根据多年的教学实践,结合着各类习题谈一下解决相关问题的常用策略.策略1利用函数零点存在性定理若函数y=f(x)在区间[a,b]上的图象是一条不间断的曲线,且f(a)f(b)<0,则函
The problem of the number of zero functions is a common problem in high school mathematics and often occurs in various examinations.This problem not only involves the basic mathematical knowledge but also involves the basic mathematical thinking and methods, , The overall substitution, etc. The author based on years of teaching practice, combined with various types of exercises to talk about common strategies to solve related problems.Policy 1 using function zero existence theorem If the function y = f (x) in the interval [a, b ] On the image is an unbroken curve, and f (a) f (b) <0, the letter