Top Student

When Xu You saw the question at first glance, he found the entry point to solve the question.

"According to the condition of a\u003c|a|, it can be concluded that a is less than 0. The whole inequality is divided by a at the same time, the sign of the inequality is changed, and the purpose of reducing the power can be achieved at the same time." Xu You was thinking quickly in his heart.

In this way, the entire inequality not only removes the absolute value, but also becomes a quadratic inequality with one variable.

Next, it can be solved with high school knowledge.

In less than a minute, Xu You calculated the answer to the first question.

And it is the speed achieved when the deep learning state is not turned on.

It's not because of anything else, it's just that Xu You has done too many questions like this in the past period of time.

In just 20 minutes, Xu You solved the first eight fill-in-the-blank questions.

Even if the difficulty of each question exceeds the final question of filling in the blanks in the college entrance examination.

But for Xu You now, they are all just basic questions.

The quick solution to fill in the blanks left Xu You with an hour to answer the questions.

Let Xu You have enough time to deal with the next three big questions.

The first big question is a question about solving triangles.

Compared with solving triangles in the college entrance examination, there is more knowledge of vectors and basic inequalities.

But such difficulty is still too easy for Xu You.

In ten minutes, the first big question was easily solved.

The next two big questions are the question types of functions and conic sections.

Compared with the first big question, the difficulty has increased a lot.

But within half an hour, Xu You also successfully made it.

Looking at the time, there are still 20 minutes left.

At this time, some students have already handed in the papers one after another.

But it's not that they have finished answering the paper, they just know that they can't do it sitting still, so it's better to hand in the paper in advance and go home early.

Xu You was not in a hurry to hand in the papers, after all, there was still a second test to come, so he couldn't leave.

After careful inspection, Xu You handed in the paper on time.

After the first test, the candidates couldn't help complaining.

"I've been working on this first question for a long time. It looks like an inequality, but it's actually an inequality group of three inequalities, with absolute values."

"Why are there no multiple-choice questions in the math competition? You don't even get a test!"

"I can't finish the paper in 80 minutes. I just wrote one and a half of the big questions and it's time."

Some students who were not fully prepared for the competition had already been defeated by the first test and gave up the second test one after another.

The second test has not yet started, and the number of candidates in the examination room is less than half of that of the first test.

During this period, Xu You did not communicate with any other candidates.

There are no classmates Xu You knows here, and Xu You has nothing to complain about the test.

After all, the difficulty of these questions can only be said to be ordinary.

As long as you prepare carefully at ordinary times, it is impossible to do it without thinking.

It's better to use these 20 minutes to take a good rest.

The second test after a while is the real test.

After 20 minutes, the second trial began.

There are only 4 questions in the second test, but all of them are complex questions.

It can be said that it is not easy to do one thing right.

After glancing at the four major questions, Xu You also noticed that the difficulty began to increase significantly.

The first problem is to find the maximum value of the algebraic expression.

Xu You read the topic carefully, looking for the starting point of the topic.

Xu You didn't have an obvious idea at the beginning, and first deduced some conditions of the question.

But at a crucial step, Xu You fell into a stagnation.

"By the way, use the mean inequality!"

At this time, this important inequality suddenly popped up in Xu You's mind.

Mean inequality, also known as mean inequality, mean inequality, is an important formula in mathematics.

In high school math, only a small part of it is learned: basic inequalities.

But for Xu You who is preparing for the math competition, such important knowledge naturally needs to be familiarized with and mastered.

"Using the property of Hn≤Gn≤An≤Qn to transform, the maximum value of this algebraic formula can be derived!"

After some deduction, Xu You took advantage of this key property to successfully solve the whole problem.

...

Soon, 150 minutes passed.

During this period, many students gave up struggling and chose to hand in large blank rolls of paper.

If it's a fill-in-the-blank question, if you can't, at least you can write any number on it.

But for such a big question, if you don't have a thought, you really can't even get it.

At most, it is to write a little formula, and pray for some sympathy points from the teacher who grades the paper.

At the moment before the bell rang, Xu You finally finished the process of writing the last big question.

"Huh~ It's dangerous, I finally finished my answer."

This time, Xu You didn't even have time to check.

However, to be able to solve all four major questions in the second test, Xu You was already very satisfied.

Xu You thought that his thinking was correct, but he didn't know if there were other problems in the process.

The two invigilators, after collecting the papers, were also discussing in a low voice.

"The competition questions are really different. In these provincial experiments, there are many students from No. 1 Middle School and No. 2 Middle School who are empty."

"Yeah, this question is really not easy. At that time, I scored more than 130 in mathematics in the college entrance examination, and I couldn't even understand many questions."

The two looked at the name and test number of each test paper to check whether there were any missing test papers.

"Um?"

At this time, they suddenly saw a very special test paper.

Not only is the handwriting beautiful and neat, but the process of each question is also fully written.

Although there are some traces of delineation in it, it is precisely this that reflects the thinking process of the examinee when solving the problem.

"No.4 middle school...Xu You?"

Seeing the No. 4 Middle School, both of them were a little surprised.

Although the Fourth High School in Shengcheng is not bad, it is far from top-notch.

"Look at these processes, do they seem to be correct?"

"Although I can't understand it, it looks very powerful."

"Just now, I saw a boy who answered the question very seriously, and he didn't look up the whole time. When the boy answered the question seriously, he was quite attractive. It should be that boy."

"Looking at the paper, the grades probably won't be low. If it's really not the case, who would waste two and a half hours sitting here and scribbling."

"It's true, it seems that this year's Fourth Middle School will produce top students."

This time, there was no friend like Hu Shucheng, waiting outside for Xu You to answer the questions together.

Xu You had a casual meal outside, and instead of going home, he went back to school.

Although I took a day off before, there is still noble class to attend in the afternoon, so I can't just delay it.

Now Xu You has plenty of energy every day.

Even though he had just gone through a morning of high-intensity answering questions, after a period of rest, Xu You still felt that he was in good shape.

"Xu You, how did you do in the exam?"

Seeing Xu You's return, Hu Shucheng hurried over to inquire.

"It's all done anyway, I don't know if it's right."

Xu You felt pretty good about himself, but before the results came out, he couldn't guarantee how many points he could score.

"Just finish the answer. Based on what I know about you, it's basically the same. Hehe, you don't even know that the students in the math sprint class all cried, and Teacher Qin didn't have a good lunch."