I just want to be a quiet and powerful person

There are 53 people in total, and almost 70% of the students skipped classes. Isn’t this a slap in Lao Dai’s face?

There is no other way, students who skip classes can only consider themselves unlucky.

Dai Pingbo did not inform the whole school, and he had already done his best.

In fact, Lin Xian could probably guess what these students who skipped class were thinking.

I guess they all asked about Dai Pingbo and knew that he had a good personality and usually didn't mention names. They thought it would be fine if he skipped a few classes occasionally.

However, there are more than one or two people who think so. Everyone thinks so, so the current situation arises.

To be honest, if Lin Xian hadn't suddenly become interested in mathematics, he would probably have skipped class today.

After the names were called, Dai Pingbo glanced at Lin Xian, who was sitting in the front row, and his expression softened slightly.

"Start class now!"

Picking up a piece of chalk, Dai Pingbo started teaching.

"Mathematical modeling is the most common manifestation of applied mathematics and the most intuitive manifestation of mathematics in life. Comparing a person to a whole, then mathematical modeling is equivalent to the human skeleton……"

Dai Pingbo's teaching level is still very good. In just a few minutes, he intuitively introduced the specific content and functions of mathematical modeling.

To put it bluntly, mathematical modeling is to transform mathematical knowledge into practical applications in real life.

This requires not only mathematics, but also strong logical thinking skills and a huge reserve of knowledge.

For example, using mathematical modeling to manufacture a folding chair involves a series of knowledge such as materials science, human mechanics, engineering, etc.

In addition, you must have certain computer skills, because mathematical modeling often performs tedious and complex calculations, and using computers can improve efficiency.

Due to the previous atmosphere, the dozen or so girls in the back row began to behave well. They all pretended to listen carefully, and some were even taking notes.

But as I listened, something was wrong. who I am? where am I?

What am I doing?

After these three soul tortures, these girls finally gave up and started playing with their mobile phones.

Dai Pingbo ignored them and continued teaching.

Lin Xian, on the other hand, experienced tutor-like treatment.

It was obvious that Dai Pingbo was teaching him alone. When he talked about certain knowledge points, he would stop and ask Lin Xian if he understood.

If Lin Xian shook his head, he would repeat it several times.

Letting a university professor serve as a tutor is such an awesome treatment.

Anyway, Lin Xian felt very good.

After the 90-minute lecture, Dai Pingbo took a sip of tea and asked with a smile,"How do you feel?"

Lin Xian nodded and said,"It feels like opening the door to a new world. It's very interesting."

"Mathematical modeling is the same as basic mathematics. The best way to improve is to do more questions. Don't be afraid of making mistakes, because you can make progress only if you make mistakes. Dai

Pingbo smiled kindly and said:"I will give you an assignment. You go back and do it slowly. Just leave it to me in the next mathematical modeling class.""

As he said that, Dai Pingbo took out his pen, pulled out a piece of white paper, and quickly wrote down a question.

After taking the question, Lin Xian was confused when he saw it.

【Depth hole estimation: If you stand at the entrance of a hole and only have a calculator with a stopwatch function on you, and you want to estimate the depth of the hole by throwing a stone and listening to the echo out of curiosity, given that you see a mass m= 1kg stone, and the echo time in court is accurately determined to be t=5s. Based on the following situation, analyze this problem, give the corresponding mathematical model, and estimate the depth of the hole.

(1) Excluding air resistance;

(2) Due to air resistance,... proportional coefficient = 0.05;

(3) Due to air resistance,... proportional coefficient = 0.0025;

(4) In the above three cases, if the echo transmission is also considered The time it takes to come back. ]

Seeing his expression, Dai Pingbo patted his shoulder and said with a smile:"Go back and think about it slowly, even if you can't do it, it doesn't matter." Lin Xian nodded and said,"Okay, I'll give it a try when I go back."

After Dai Pingbo left, Lin Xian suddenly discovered that none of the girls in the classroom had left. At this moment, all of them were looking at him with strange eyes.

Their thoughts are similar to Lei Hongguang's. Shouldn't someone as rich and handsome as Lin Xian flirt with girls, race cars, and visit nightclubs?

If not, you can play golf or bowling.

Lin Xian's performance was so different from their imagination that they couldn't help but feel a strong sense of disobedience.

The style of painting is completely wrong!

Lin Xian ignored them, packed up his books and returned to the dormitory.

Now that the day study procedures have been completed, I can go out at any time.

Lin Xian stuffed the alien notebook into his shoulder bag, took"Mathematical Analysis" and the homework assigned by Dai Pingbo, and drove the Ferrari out of the campus leisurely.

……

After returning home and pushing the door open, Lin Xian couldn't help but be slightly startled.

The whole house has a new look.

There are some art paintings hanging on the walls, and many trinkets placed on the coffee table and counter. In addition, a wicker chair hanging basket stands on the originally empty balcony.

Zhuang Tong and Nie Qingqing were lying comfortably in the hanging basket, holding a laptop and seemed to be watching online dramas.

Seeing Lin Xian coming back, Zhuang Tong sat up and said with a smile:"My dear, are you back?"

"Okay, the home is well decorated! Lin Xian looked at the room and said with satisfaction.

Zhuang Tong has a very good taste and taste, and the decorations fit well with the decoration style of the house.

What satisfied him the most was the wicker chair hanging basket on the balcony, which he lay on in winter. Up there, reading a book and enjoying the winter afternoon sunshine is simply not too pleasant.

"Like it?"

Zhuang Tong looked like he was about to praise me, which was particularly cute.

"like! A good reward for you tonight!"

"Ahem! Can you please pay attention, there are outsiders here!"Nie Qingqing said quietly.

This couple became more and more unscrupulous and started in front of him.

Lin Xian put on his slippers and joked:"You can join in, I don't mind."

Nie Qingqing's appearance is not bad, with a score of 91 and a figure of 87. Although she is slightly worse than Zhuang Tong, she is still a proper goddess. I don't know how many licking dogs kneel down to lick her. Both of them have their own merits. Lin Xian wouldn't mind having another lover if she wanted to

"Hee hee, I don’t mind either, it’s better this way, we can be best friends for life."Zhuang Tong said with a smile.

For a moment, Nie Qingqing's heart was moved.

But thinking that if she became a mistress, her parents would probably beat her to death, so she immediately suppressed this crazy idea.