As long as Lu Xi starts to solve the problem, no matter how difficult the problem is, she will immediately enter the state of solving the problem and forgetting the object.

After entering this state, in her eyes, only the topic remains, and everything outside the topic is no longer within the scope of her senses.

There were teachers, and there were several teachers watching from the sidelines, and it didn't have any effect on her.

When Lu Xi answered the question, his heart was as calm as a mountain, but Mr. Wang, who was watching from the side, was as angry as flowing water.

It's really Lu Xi's answering speed is too fast, and the illusion he has is that he writes down the answer when he sees the question without any pause.

He has done this league test paper, and it is not difficult to say.

It's just not very difficult, but to be able to come up with the answer immediately after reading the question, he doesn't think his thinking speed can be so fast.

Thinking of this, he subconsciously glanced at Teacher Fu next to him.

Teacher Fu's eyes hidden behind the big black-framed glasses narrowed slightly, not knowing if he was looking or thinking about something.

Mr. Fu is the mathematics competition instructor of the Oban Mathematics Group, and he has a lot of experience in this area, so he can probably do it so quickly.

Teacher Wang thought for a moment and turned around.

Fill-in-the-blank questions are done so quickly, isn't it possible to solve them so quickly?

Then he saw Lu Xi writing scratch paper.

Well, the difficulty of solving the questions has gone up a notch, and the calculation process is also a lot more cumbersome, and it is indeed necessary to do some deductions on scratch paper.

He has seen students deduce several pages on scratch paper, but in the end, they can't come up with an answer because the deduction is a mess.

But what surprised him was that Lu Xi's calculus was neat, clear and rigorous, and he quickly took a closer look and found that it was not a draft at all, but a direct proof process of writing the problem.

First question: The first grade, 4 points, right, the second grade, 8 points, right.

This is followed by the second question, 16 points, and the whole process is exactly the same as the standard answer.

The first solution was solved very simply.

Mr. Wang raised his hand and looked at his watch, which took less than three minutes.

When Mr. Wang looked at the watch, Lu Xi started the second question, which was a little more difficult than the first one, and the 20-point answer question.

The second question has only one question, if the idea is clear, the operation is not cumbersome, just a few steps, the process is simpler than the first question, the difficulty is to find the idea and entry point.

So as soon as Lu Xi made a little contact, he began to write.

For her, who has a flexible mind and has read a lot of tutoring books, thinking has never been a problem.

Solution: From the known conditions, it is known that for any positive integer n......

The entire teacher's office was unusually quiet amid the sound of morning reading outside.

In summary, the α values that meet the requirements are......

The second question, OK, the third question, is finished and finished.

Lu Xi put down the pen and felt that someone was beside her, she looked up and saw that Teacher Wang was staring at the answer on her scratch paper with fixed eyes, so she called softly: "Teacher Wang? ”

Teacher Wang came back to his senses and nodded, with a slight joy on his face: "It's done." ”

"Yes, Mr. Wang, then I'll go back now?" Lu Xi asked, after finishing the papers, can I go back.

There was still some time before the morning reading class, and she was going back to the morning reading class.

"Are you tired?" Teacher Wang asked with a smile.

"Nope." Lu Xi shook his head and replied, the first test paper of this league can only be said to be a warm-up at best.

"Then sit down for a while and drink a glass of water." Teacher Wang said, the service was very thoughtful, and he took a cup of warm boiled water with a disposable cup and handed it to Lu Xi.

"Thank you." Lu Xi hurriedly stood up and took it, thanking her, this math teacher was too polite, making her feel not too natural.

It was just Teacher Wang's next sentence that made her almost squirt out the water she drank in.

Teacher Wang smiled and teased: "The next two classes are math classes, don't be busy going back, I think, you don't like listening to my classes very much, do you?" ”

Seeing that he had successfully tricked Lu Xi, who was not smiling, Mr. Wang smiled, took a red ballpoint pen, and corrected the scroll made by Lu Xi.

One by one, the big red hooks, in a blink of an eye, the paper was corrected, with a total score of 120 points and a score of 120 points.

Looking at Lu Xi, who made the rolls fast and well, and could be called flawless, Mr. Wang was overjoyed.

Because Lu Xi's last test score was a full score, and he also saw Lu Xi reading the difficult math competition tutorial book of the proposition person's lecture, plus he thinks that no one will deliberately memorize the answers of the league in order to cope with the exams that may be encountered in the future, not to mention that as long as it is a person with a normal IQ, there is no need to lie about this kind of thing.

Therefore, Mr. Wang chose to believe that Lu Xi said that he had never seen the papers that had been tested in this league, that is to say, he believed that Lu Xi's results were the embodiment of 100% strength.

And he found that when Lu Xi saw that the roll he made got a full score, he didn't have that kind of overjoyed and excited expression, but the kind of stability that seemed to have been expected and Zhizhu was in his hands.

This kind of mentality is commendable, and the appreciation in Mr. Wang's eyes is even heavier.

"The roll is very well done, are you interested in making another one?"

In fact, it's not just good, in the past few years, no one has scored a perfect score in the league.

Students who participate in the mathematics competition, those who are relatively good, generally do not pay much attention to the first test, and put a lot of time and energy on the second test that is in line with the CMO and IMO.

Of course, there is nothing wrong with paying attention to the second test. After all, the CMO and IMO after the National High School Student Mathematics Joint Competition are all tested within the knowledge range of the second test.

It's just that such a utilitarian cart before the horse is undoubtedly a disease.

And this is also the reason why some students who engage in mathematics competitions can achieve good results in mathematics competitions and take the college entrance examination, but they may not be able to get high scores, and the foundation is not solid enough.

Make another one? That is the league additional test, that is, the paper of the second test.

Looking at Teacher Wang's smiling and somewhat hateful expression, Lu Xi understood that if he didn't finish the paper given by the math teacher today, he wouldn't want to walk out of the door of the teacher's office.

It's really that the gate of the teaching office is open to the south, so don't come in if you have something to do.

After resting for a few minutes, Lu Xi received the roll.

In the 201× National High School Mathematics Joint Competition (Paper A), the papers of the second test not only did not have multiple-choice questions, but also did not even fill in the blanks, only the answer questions remained.

The amount of questions is very small, there are only 4 questions, the first two questions are 40 points each, and the last two questions are 50 points each, for a total of 180 points.

The time to solve these 4 questions is 150 minutes, two and a half hours.

Although the number of questions is small, because the difficulty is more than one notch, the test time is more than double that of the first attempt.

Lu Xi buried his head in the case, did not start writing immediately, but silently browsed the papers of the second test.

From the first to the fourth, I quickly read it, and while watching, my brain turned, opened my mind, and quickly deduced.

Lu Xi's situation, in the eyes of Teacher Fu, who had been just quietly watching and not speaking, became because the topic was too difficult, and he was at a loss and had no way to start.

This year's second test is not the most difficult in the past, but it is above average. However, this kind of extended second test question is indeed too difficult for a first-year high school student who has no competition experience and no special training.

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