Chapter 83

"It just so happens that Mr. Gu is here, come and judge us, who is right and who is wrong?" said the male teacher, who was one of the parties, to Gu Lu.

"Me?" Gu Lu pointed to himself.

"That's right, it's you, Teacher Gu. The male teacher got up and pressed Gu Lu on the stool, "We all know it, Princeton's graduating students!"

Gu Lu's identity is no longer a secret in the entire mathematics group.

In the last semester, everyone had already begun to realize that Gu Lu was not an ordinary person.

Especially when Gu Lu, as the leader of the national team, went to IMO, that weirdness became extremely strong.

National Team Leader!

How can an ordinary high school teacher fill such a high school position?

Later, everyone went to inquire about it, and finally learned from Vice President Chen that Gu Lu's real education - a double doctorate in mathematics and physics from Princeton University!

After learning this information, everyone gasped on the spot.

Although I don't know why the top students who graduated from Princeton chose to be an ordinary math teacher in their high school, one thing cannot be denied - Gu Lu is a real god!

The contempt of everyone in the mathematics group for Gu Lu dissipated in an instant after learning Gu Lu's true identity.

All that was left was admiration and admiration for this young and handsome teacher.

"Teacher Gu, you do it!" The male teacher asked Gu Lu to sit down, then brought a test paper to Gu Lu, and pointed to one of the fill-in-the-blank questions, "Ah, this is the question, Teacher Gu, you can help take a look." ”

Since they all said this, it was another colleague, and Gu Lu was no longer good at continuing to excuse himself, so he looked at the test paper.

The test paper is the second-mode test question that has just ended in Hengshui Middle School.

The male teacher pointed to the last question of the fill-in-the-blank question.

It's an inequality type problem, but it's not a difficult problem, it only needs a simple operation and a step-by-step deduction.

However, the key point of contention between the two teachers is whether the problem can be solved by induction, and the general formula of the inequality can be directly substituted for numerical solutions.

"Lao Wang, since you said that my inductive method is not feasible, then how do you explain the question that the answer I calculated is the same as the standard answer?" The young male teacher standing beside Gu Lu saw that Gu Lu was still thinking and spoke.

"Coincidence, coincidence. The older teacher took out the mirror and unhurriedly straightened his Mediterranean hairstyle, "Anyway, I won't agree with your solution, it's illogical!"

"The answer is correct, I think the odds of a coincidence are slim. "The young male teacher was stubborn.

The older male teacher took a sip of wolfberry tea from the thermos cup, and gestured in the direction of Gu Lu, "Teacher Gu isn't here, just wait for him to answer us in a while." ”

Gu Lu, who was surrounded by several people in the middle, glanced at the question, and looked at the detailed solution using the induction method written by the male teacher in the blank space of the test paper from beginning to end, and muttered for a few seconds.

"I guess, I should get it. Gu Lu spoke in a light tone.

"Teacher Gu, tell me about it. The young male teacher was the first to speak.

Gu Lu smiled and said, "This question can actually be used by induction!"

The young teacher's face was overjoyed, and he just wanted to say something, but was stopped by Gu Lu raising his hand, "Teacher Li, listen to me first." ”

Gu Lu explained to everyone, "This problem can be used with the inductive method, but it is not like the solution given by Mr. Li, which rigidly strings the induction method and the fallacy method together. ”

"Uh......" the young teacher looked embarrassed.

The older teacher spoke at this time, "Then Teacher Gu, what should be the correct solution?"

Gu Lu casually found a pen on the table, then took a blank piece of A4 paper, and explained while writing, "It's very simple, use incomplete induction." ”

"Not a complete induction?" the young teacher was stunned.

"Yes, incomplete induction!" Gu Lu wrote a few lines of formula on a piece of paper, "This general inequality obviously does not meet the definition of complete induction. Except when k = 1, when k is equal to 9, 17, 25, and so on, the inequality cannot be true. ”

"So at this time, it is necessary to make incomplete induction to obtain a condition that does not meet the universality, and then substitute the numerical value!"

At the same time as the words fell, Gu Lu had already finished the entire derivation process on paper.

The solution is exactly the same as the standard answer.

"Awesome!" exclaimed the young male teacher beside him.

The older teacher rubbed his chin and nodded frequently, "I didn't expect it to be like this, I've seen it, I've seen it!"

However, it is not easy to use the incomplete induction method, but it is difficult to implement on paper, that is, if you want to solve the question, it is not recommended to use this method to answer. But it's just a fill-in-the-blank question, so it doesn't matter, it's naturally how quickly it comes. Gu Lu shrugged and smiled.

…………

After solving the dispute here, Gu Lu returned to Su Xi, who had a bright look in his eyes, opened the food box, and chatted casually with Su Xi without saying a word while eating breakfast.

"Gu Lu, your prestige in your office is very high!" Su Xi exclaimed.

Gu Lu picked up the poached egg and swallowed it in one gulp, "Yes, why didn't I feel it?"

"Yes!"

"That's probably because...... I'm so handsome, isn't I?"

"Well, I think so too!" Su Xi held his chin, looked at Gu Lu's cheeks, and then nodded again and again with a sense of agreement.

A young math teacher passing by: "......"

At this time, Zhou Haihong pushed open the office door and walked in.

"Everyone stop what they are doing, and I'll announce something!" Zhou Haihong then left the briefcase on the desk, clapping his hands to attract everyone's attention.

"The school is going to hold an activity called 'Let Parents into the Classroom' next week, the main purpose of which is to let parents go into the classroom to listen to the class on the occasion of the last 100 days of the college entrance examination, understand the learning status of the students and the teaching situation of the teachers, and let parents have full confidence in our school!"

"Director Ma asked me to remind everyone that from next week, you must pay attention to your appearance as a people's teacher. ”

"Lao Wang, it's time for your hair to be barbed! Your hairstyle is a cosplay fire cloud evil god? How good it is to shave your head directly like an old horse, and you don't have to worry about hair loss if it's cool. ”

"Also, Xiao Li, don't snicker there, don't wear lipstick, don't wear lipstick, how many times have I told you, hurry up and wash it in the bathroom!"

"Also, old Qian, I know you have a big temper, but be careful not to curse in class! You said that if you scold one person alone, forget it, and bring the whole class with you!"

Zhou Haihong reminded everyone with a serious face.

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PS: Asking for recommendation votes!!