Suddenly, hearing Lao He's praise for himself, Li Jun was very happy.

When everyone saw Li Jun, who hadn't been in class for a long time, he was said by Lao He, his expression was still as calm as water, and even the corners of his mouth were slightly smiling, didn't he listen to the class, could he really solve that problem?

Although he is a top student, he must not be so powerful.

Li Jun also took a look at this question, in fact, if the difficulty coefficient is five stars, it is at most three stars, and it can be answered with his eyes closed.

However, in this era, not only the students, but even the teachers have a poor foundation, so they find this topic difficult.

Because the high school teachers in this era are either graduated from high school or secondary school students, this kind of teaching level is naturally not very high.

Otherwise, Ma Yun would not have just scored 19 points in the college entrance examination in the 80s, and he would have been able to go to Normal University.

The requirements of the college entrance examination in this era are really not high according to the inspection requirements of later generations, and the admission score is also low. 3780 points in science is enough, and if you get more than 400 points in the exam, you will dare to peep at dozens of key universities directly under the state.

In those years of the movement, the Chinese intellectuals were disconnected...... Everything is actually a low-starting era, and the teacher is quite brutal, corporal punishment, the teacher uses a bamboo board to whip the palm and back, give you a violent chestnut, pull your eyelids, and the parents are also a sentence, teacher, my boy, you can beat it casually.

In such an era.

In such an era when you can read an undergraduate with a score of 370, his beautiful table Zhong Ling scored 87 points, which is actually quite powerful.

Yu Li Jun is just that, she has a solid foundation, and when she comes to this era, she is a real scholar.

"Li Jun, will you be able to ask this question?" Lao He's eyes were full of hope.

At this time, Li Jun got up from his seat and said, "Teacher, I will do this question." ”

Li Jun can see at a glance what this question examines is the level of derivation of two stars, the level of insight of one star, and the level of judgment of two stars...... Then the difficulty factor of this question becomes three stars.

"Okay, okay, then you come up. ”

Teacher He was very excited, Li Jun in their class could really solve this question, that is, if he really took this exam, he would really be able to get a high score and get the first score, because no student in the whole grade could solve this question in this exam.

This topic, in the eyes of Lao He, looks difficult, this topic is a mixture of many things, is a comprehensive exam question, it examines the parity and monotonicity of functions, and then the logarithmic function of the bottom formula, as well as the zero point of the quadratic function, as well as sinα and tanβ transformation.

However, this problem is not finished, because it not only examines the definition domain of the function itself, but also needs to understand the range of values of independent variables in combination with practical problems......

Li Jun took the test paper of Zhong Ling at the same table to the stage.

Then he took the white chalk handed over by Mr. He and began to move the pen on the blackboard.

Everyone found that solving the problem was not very important, and everyone was attracted by his chalk words at this time.

Li Jun's chalk writing is really beautiful.

I didn't find that Li Jun's chalk writing could be so good before. It is ten times better than Mr. He's chalk handwriting, and they have always thought that Mr. He's chalk writing is very powerful.

Mr. He was also very surprised, his chalk writing had been practiced for many years before he could write like that...... However, that Li Jun's words were not so good before. How can chalk words become so capable, sharp, stylish, and good-looking after a sickness.

After a while, Li Jun wrote a small half-blackboard.

Then the classroom was just the sound of Li Junsha writing on the blackboard.

This Li Jun answered the question in one go, and he didn't even type the draft next to him, and solved the problem step by step on the blackboard, and the formula was listed in great detail.

Li Jun had finished the solution, but he felt that there was actually an easier way to solve this problem.

When he used the second method to solve the problem, he thought of the third solution.

What made Mr. He feel very good again was that Li Jun actually used three methods to solve this question, and he only had one plan, that Li Jun, he was really ...... Xueba, how did he do it?!

Li Jun put half of the chalk head back on the podium very chicly, and then returned to his seat in the amazement of others, he returned to his seat and put the test paper in front of Zhong Ling at the same table, but Na Nizi seemed to be still immersed in Li Jun's blackboard answer and couldn't stop.

She is now looking at Li Jun's solution ideas hungrily, she now admires Li Jun, how did he do it well, he was so smart, he actually used three solutions to solve this problem.

Mr. He was shocked by Li Jun's chalk words before, and now he is also shocked by Li Jun's problem-solving process, because Li Jun used three solutions to that problem, and they are all simplistic solution ideas for complex problems, isn't the meaning of mathematics to solve the most complex problems in the simplest and most efficient way?

Compared with the idea that he was going to explain to the students, he really regarded this problem as a super problem, and then the process of solving the problem was quite complicated, fortunately, Li Jun was allowed to solve it first. If you ask Li Jun if he has a solution to the problem, he will not be embarrassed by the time comes.

"Look at it, Li Jun can have three solutions to this problem, but none of you have made it, why can Li Jun do it, you should learn from Li Jun. ”

"Li Jun, tell your classmates how you answered this question. ”

Li Jun thought that he could not say that he was a descendant...... These have actually been studied badly, and he also used some advanced mathematics, that is, college mathematics, to solve this math problem, and used college knowledge points to solve high school math problems, is this considered cheating? .

"Teacher, this is your good teaching, in fact, it is all the teacher's credit. ”

Lao He heard the joy on his face, and the previously murderous face was now laughing into a twist.

And the students in the classroom were speechless, Li Jun was really shameless, he had been skipping class for a month, and when he took these functions, he was not good at school at all, everything was taught well by the teacher......

"Li Jun, you are really good, the problem is very well solved, you are the talent we need in China, you have to continue to work hard, our country needs talents like you, you are the best student I have ever taught, you will be a talent who contributes to the construction of the motherland and the four modernizations......"

This teacher and student began to enter a state of cycle of praise and mutual praise......

……

……

The other students all had a sentence in their hearts at this time: "The big one and the small one are really enough." ”