On the set, many students think it is very simple, especially those with good academic performance. They think that a set is the condensation of subsets, proper subset, intersection, union and complement, but this understanding needs to be deepened. The relationship part of elements in a set is a very important point of investigation and an open point of thinking. However, the relationship between the elements in the set is not as simple as disorder, difference and determination, which needs further in-depth analysis. In NMET, it is easy to think about this problem from an opposite angle, such as disorder. We can examine the nature when the elements are arranged in sequence, such as the finale of Beijing paper 20 10, and then consider the relationship between the elements in this set. Therefore, students must think deeply and summarize the properties of the elements in the set.
As for the function, it was still very difficult in high school. Every year, the college entrance examination will test the idea of function from all aspects. In recent years, the college entrance examination likes to make a fuss about the concept of function, so students must start with the concept and deeply understand the internal essence of function. At the same time, we should understand the relationship between set and function, the nature of function and the relationship between function properties. At the same time, we should master the main ideas of functions, such as the idea of combining numbers with shapes, the idea of transformation, the idea of classified discussion and so on. ?
It should be noted that senior one is a stage of high school entrance, and its function is the main line of high school. Therefore, for senior one students, we must thoroughly understand the internal relationship between set and function, the internal essence of set and function, and the summary of set and function, so as to prepare for the college entrance examination.