The difficulties encountered in the review of mathematics for the postgraduate entrance examination,

Actually, you don't have to understand this, you just need to know that there is such a definition! In fact, the reason is very simple, the limit is that when n tends to infinity, the value of the function is a fixed value. And when is n called tending to infinity?

Here we define an n, and when n > n, we consider n to tend to infinity. If you still don't understand, you can search the Internet**. The basic class will definitely talk about it!

I wish you all the best in your graduate school entrance examination!

Answer: Landlord, what major have you crossed from to what major?

It is defined as saying that when the independent variable tends to a fixed value, the value of the function also approaches a fixed value. All right! What you remember is the process of approaching.

How do you express a function value approaching a number? We can characterize it by the absolute value of its difference from this number. And how similar are they?

That's the size of the difference. When the limit is approached by the independent variable to a fixed value, their difference is actually a process of getting smaller, that is, from a relatively large spacing at the beginning to 0. And how to characterize the final infinite approximation, which is equal to that value?

That is, the final difference is 0! Right? And how to represent it during the approaching process?

Let's define an imaginary small number first, and as for how small it is, we won't delve into it. So if I can find that the independent variable can be smaller than him when approaching, is that okay? Hehe, you can slowly realize it!

Judging from the reactions of candidates every year, mathematics is a headache for many students, and it is very difficult, but it accounts for a large score for the postgraduate entrance examination. Therefore, preparing for the postgraduate entrance examination mathematics is also a headache for many candidates. Therefore, this paper sorts out several situations and solutions that are often encountered in preparing for postgraduate mathematics, hoping to provide help for students to prepare for postgraduate mathematics.

Judging from the past 15 years, it is found that about 80% of the questions are concentrated on the basis of the exam, and the proportion of deviant and strange questions that really need to rack your brains and meditate is very small. Therefore, when reviewing mathematics for postgraduate entrance examinations, students should focus on textbooks and after-class questions to master basic concepts, basic formulas, basic theorems and basic problem-solving methods. Limits, derivatives, and indefinite integrals are foundations that need to be firmly grasped.

The following contents such as definite integral, applications of unary calculus, median value theorem, multivariate calculus, etc., can be regarded as specific applications of the first three parts.

On the premise of laying a solid foundation, grasp the key points and difficulties of the examination according to the syllabus of the postgraduate examination and past past questions. Bian Xiao advises students not to read the chapters on the median value theorem and inequalities in the first round of review (especially candidates with a weak mathematical foundation), because your knowledge reserve is still very small in the first round, and your mathematical thinking has not yet reached a certain level. These two parts were originally intended to examine a person's comprehensive mathematical thinking, but now it will be difficult to look at the median value theorem.

This part can be reviewed in the second round, focusing on the training of this part of the question type, and finding out the style, ideas, and habits of the question type. Now it's time to brush up on the basics with a down-to-earth approach.

Every graduate student who takes the math exam has experienced this level. How can a graduate student calm down and review without getting hit? Smile, steady, and you're sure to win!

Only with confidence can we be handy. Don't spend your time questioning your abilities, but think about how you can keep improving yourself. Mistakes must be recorded.

It is convenient to check when reviewing in the future, find out the reasons for mistakes, master the common methods and ideas for solving such problems, and ensure that similar problems can be solved effortlessly. When reviewing, some candidates just passively accept knowledge, which is mainly reflected in simply reading books, reading example questions, listening to lectures, and watching other people's analysis methods and steps.

They have poor active learning ability and tend to put in more input and less output. When doing the questions, you must think a lot, do it yourself, and don't rush to see the answers. In this way, there is a deeper grasp of the knowledge, which is easy to check and fill in the gaps.

In the long run, we will have the ability to solve problems independently. In the process of practice, we should pay attention to improving the comprehensive application ability of knowledge, and strive to improve the speed and accuracy of doing questions. The above are some of the typical problems that students will encounter in the process of preparing for the graduate school entrance examination.

I hope that students can overcome these difficulties and prepare for the exam scientifically. I wish all students can realize their dreams of going to graduate school.

The biggest difficulty should be memory, because many formulas need to be memorized, which will be very complicated.

It should be that the idea of some questions or the learning process is more difficult, because the difficulty is also relatively large, and it is difficult for me to accept.

It is to improve one's learning ability. You must find a study method that suits you and improve your learning ability, so that you can succeed in the graduate school entrance examination.

It's just that we can do some math problems, and our grades have not been able to improve, which is the biggest difficulty we encounter, so we should study hard.

I feel that the biggest difficulty should be that there will be no sense of direction in the process of revision and there are many very important knowledge in mathematics, such as advanced mathematics. Implications, theorems. I feel that I can apply for training classes, because I can learn from them, which will be more systematic, and it will be easier to be familiar with the test centers and hot spots, as well as some question rules.

The shared solution is as follows, and the solution is solved by applying Stoz's theorem. Let xn=1 k+3 k+....+2n+1)^k，yn=n^(k+1)。[c(n,k)" indicates the number of combinations of k from n.

Obviously, strictly incremental and unbounded. Whereas, n (k+1)-(n-1) (k+1)=c(k+1,1)n k-c(k+1,2)n (k-2)+....1)^(k+1)，∴lim(n→∞)xn-x(n-1)]/yn-y(n-1)]=lim(n→∞)2n+1)^k]/[c(k+1,1)n^k-c(k+1,2)n^(k-2)+…1)^(k+1)]=2^k)/(k+1)。Satisfies the conditions of Schtutz's theorem.

lim(n→∞)xn)/(yn)=lim(n→∞)xn-x(n-1)]/yn-y(n-1)]=2^k)/(k+1)。

There's no way back now, and as far as math is concerned, doing the past two times is the fastest and most effective way to do it.

Take every step of the way.

Personally, I think that now we should focus on doing set questions, whether it is mathematics or English, we have to start doing set questions to strengthen the overall practice.

Now that the knowledge has been almost learned, now the main focus is to check and fill in the gaps