These little knowledge points are relatively high in the investigation over the years. Through our analysis, if we do the limit test, it is mainly to take Robida's law and equivalent infinitesimal substitution, especially for three-year-old students, there may be great problems here.
2. Handle the relationship between continuity, derivability and differentiability.
It is required to master the derivation methods of various functions. For example, the derivation of implicit function, the derivation of parameter equation and so on, as well as the application of unary function, which is also a key point in previous exams. The junior high school students here combine some economic problems to investigate.
3. Parameter estimation
This is where we often make big problems. For the candidates who count one, two and three, this piece contains two knowledge points, one is moment estimation, the other is maximum likelihood estimation, and the focus is on big questions.
4, the sequence problem, mainly for the number one and the number three.
The emphases of this part are: the properties of 1. constant series, including convergence and divergence; Second, when it comes to power series, everyone should master the calculation of convergence interval, the function of convergence radius sum, the expansion of power series, and master a skilled method to calculate. For the sum function of power series, it is possible to directly give us a sum function of power series or a series with constant terms for us to sum, and to convert it into an appropriate power series to sum.
5. Differential equations: one is a one-dimensional linear differential equation, and the other is a second-order homogeneous/heterogeneous linear differential equation with constant coefficients.
For the first part, candidates need to master nine small types, each of which has a different method of solving problems. For each different equation, different formulas can be applied. For second-order linear differential equations with constant coefficients, everyone must understand the structure of the solution. For another non-homogeneous equation, candidates should pay attention to its connection with the characteristic equation. If there is a homogeneous equation, we can find its general solution. Of course, everyone should also write its characteristic equation. This change is a trend in recent years. This kind of problem is the inverse problem.
For the second-order non-homogeneous linear equations with constant coefficients, everyone should master them by classification. Of course, there is also a difference equation problem for junior three students. Difference equation is not the key point for us, and we should remind everyone that the method of solving difference equation is similar to that of micro equation, so we should pay attention to this when learning.
6. Digital characteristics of random variables
Remember that the numerical characteristics of one-dimensional random variables are to be memorized, and they are rarely investigated separately, but often combined with the previous one-dimensional random variable function and multi-dimensional random variable function and the mathematical statistics in Chapter 6. Especially for senior one students, we will examine the impartiality when we examine moment estimation and maximum likelihood estimation.
7. Distribution of one-dimensional random variable function
This should focus on the continuous variable. There is a difficulty in this. One-dimensional random variable function is a difficult point. There are two methods to find the distribution of one-dimensional random variable function. One is the distribution function method, which is the most basic thing to master. In addition, the formula method is more convenient, but its application scope has certain limitations.
What are the high-frequency test sites for postgraduate mathematics? Bian Xiao stops here. More questions about admission, registration time, result inquiry, registration fee, admission, printing time of entrance examination admission ticket will be updated in time. I hope all candidates can be admitted to their ideal institutions. Everyone must insist on preparing for the exam.