My Identity As A Schoolmaster Has Been Exposed

"This question is actually very simple, but here you have to make one thing clear..."

After going to bed, Xu Cong didn't even mean to review the topic again, so he started speaking directly.

Time is precious, go to bed early and finish talking earlier.

Yang Kaixuan immediately pricked his ears to listen carefully, and the other roommates were also very acquainted, trying not to make other noises.

Xu Cong's thinking is very clear: "S naturally must be greater than or equal to 1+1+1+1+1, which is 5, do you understand this?"

"And S is also less than or equal to 6+7+8+9+10- (1+2+3+4+5), which is 25, right."

"Then here, we need to prove that S can take all odd numbers from 5 to 25."

"Finally, all S values ​​are: 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25."

"After speaking, you digest and digest, I go to sleep."

Hua Luo turned around, Xu Cong stopped making a sound, leaving Yang Kaixuan alone in the dark messy.

f*ck!

You Xu Cong keeps saying simple, but why do I find it so difficult!

Also, you said so fast, just like Gatling, you give me some time to relax!

what!!!

He broke down!

He now feels like he is that huge groundhog.

Speechless!

Completely speechless!

"Hey..." In the end, Yang Kaixuan let out a deep sigh, and this sound revealed the helplessness and sorrow of the whole person.

All the roommates in the dormitory heard Yang Kaixuan's sigh, they were so bitter and helpless.

Of course, they would not laugh at Yang Kaixuan, and put themselves in the position to think about how well they could do when they faced Xu Cong.

This night was Yang Kaixuan's nightmare, and it was also a lingering shadow in the hearts of other students.

I kept thinking about it in the middle of the night, but Yang Kaixuan still couldn't fully understand the question Xu Cong said.

The next day, he was helpless and could only ask Xu Cong again.

When Xu Cong saw him come with this question again, he opened his eyes and looked at Yang Kaixuan with surprise on his face.

Yang Kaixuan also had a black line on his face and said embarrassingly: "Xu Cong! Please treat me as good as other ordinary classmates, I am not much better than them, scared! I am obviously the same as them!"

"In front of you, do you think there is a big difference between ants and insects?"

"I beg you!"

Seeing him so miserable and humble, Xu Cong said apologetically: "Well, I overestimated you. Come on, do it again."

...

After the topic was settled, the topic between Xu Cong and Yang Kaixuan became far apart.

"Don't be so serious! Relax! You are always in a state of high tension in your studies, which is not conducive to your thinking." Xu Cong took the initiative to chat with Yang Kaixuan.

"I just saw a joke on my mobile phone to list the major events that have happened in the past 50 years. Do you know what this student said?"

Yang Kaixuan stared at Xu Cong, thinking: "Do you call this a joke????"

Xu Cong also knew that the story he told was a bit abrupt in the early stage, so he continued: "He said, first his father was born, then his mother was born, and finally he said he was born!"

"What a logical ghost! There is nothing wrong with it!"

Yang Kaixuan is still staring at him, really can't think of the point of his joke when he said this...

When Xu Cong said this joke, his voice was a bit loud, and he quarreled the teacher who was in class, so the teacher was a little embarrassed.

"this……"

And the teacher could see clearly that it was Xu Cong who was talking, but he was talking to Yang Kaixuan.

"This, this this!"

The teacher made a difficult task. This made me choose between Xu Cong and Yang Kaixuan. He has to do that... Otherwise, everyone will talk every time in the future. How else will he be in class?

do my best!

"Yang Kaixuan, pay attention!"

The teacher pointed out Yang Kaixuan with a bit sternly and viscerally...He also had some small breaks in his heart now.

Yang Kaixuan was looking at Xu Cong speechlessly at this time, but he was shot while lying down. He looked confused and immediately stared at the teacher angrily.

f*ck!

Teacher! Xu Cong is speaking! Not me? Why are you criticizing me?

The teacher was also very helpless, so he could only cast a gentle look at Yang Kaixuan, saying that it hurts my heart in your body!

Triumph, you have to understand the teacher's painstaking efforts.

Yang Kaixuan looked at the teacher's frantic wink, he was mad, and he greeted the teacher with a full set of three-character sutras in his heart.

Choosing between Xu Cong and Xueba, no matter which teacher it is, it can only be Xu Cong!

Xueba, in the teacher's mind, is now secondary.

Yang Kaixuan looked at Xu Cong, begged him, and said, "I beg you, what's the matter, let's talk about it after class, okay?"

Xu Cong heard the teacher call Yang Kaixuan's name and pinched his nose in embarrassment, then cast him an apologetic look.

alright!

Xu Cong stopped talking, yawned, got down and went to sleep.

After the teacher saw Xu Cong sleeping, his voice became much smaller, and he was afraid of making Xu Cong noise.

Yang Kaixuan felt the changes, and once again let out a deep sigh: "Hey..."

After a sigh, Yang Kaixuan continued to listen to the class, except for the math class, Yang Kaixuan listened selectively to other subjects.

But when he arrived at the math class, which was his home court, he stopped attending the class and was doing his own Mathematical Olympiad problems.

This is another set of test papers. After Yang Kaixuan analyzed Xu Cong's problem-solving ideas, he began to use it gradually.

Assuming that the arithmetic sequence {An} satisfies 3A₈=5A₁₃, and A≠0, Sn is the sum of the first n items, then the largest of Sn(n∈N*) is...

In Mathematical Olympiad, this is a multiple-choice question, but if it is taken in a normal exam, it can be a calculation question. Many students still can't do it.

Let's look at the next question!

Given that a and β are acute angles, sina=x, cos₃=y, cos(a+B)=-3/5, then what is the functional relationship between y and x?

This is also a multiple-choice question, and the difficulty is much more difficult than that of the ordinary examination paper, even the college entrance examination paper.

And in other questions, even if the question type is similar, the difficulty of the data increases or the question type changes.

If the difficulty of the ordinary exam is the simple mode, and the college entrance examination is the universal mode, then this Olympiad is a nightmare, even a hell mode!

The most difficult!

Yang Kaixuan answered the question blankly.

In triangle ABC, given that tanB=√3, sinC=(2/3 under the root of 2, AC=3√6, what is the area of ​​triangle ABC?

Are these question people having problems with their brains!

Find the area?

When Yang Kaixuan looked at the question, the corners of his eyes twitched and his scalp was numb, but he still bite the bullet and went on step by step, slowly answering.

Xu Cong caught a glimpse and smiled. He had seen this question, exactly the same, and the answer was ready to come out.

But with Yang Kaixuan’s problem-solving ideas, it is obviously complicated, and it takes a lot of time to write the process and steps, as well as a lot of calculations.

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