I failed a course, and the system became my study supervisor.

Chapter 4 Holidays and Stay-at-Home Assignments

"Hello, classmate. Are you free now? I want to ask you a question. There are not many people in the library. I looked around and you are the only one closest to me." The girl said a little embarrassedly.

"It's okay, I'm free. What's the topic? Let me see it." Xu Ling agreed happily.

Who can resist a shy little girl?

Hearing Xu Ling's answer, the girl was delighted and immediately handed over the question in her hand, and also kindly attached a draft paper.

"Find the integral: ∫ arctan(tanx)/tanx dx. The integral is limited to 0 to π/2."

After taking a look at the question, Xu Ling started calculating without thinking, saying as he did so:

"This problem is simple, right? You can just replace arctan (tanx) with x, then consider the imperfections of the function, convert it into an imperfection integral, and then use integration by parts to directly integrate it."

Seeing that the problem that had troubled her for a long time was solved so easily by Xu Ling, the girl was shocked and even suspected that she was attending a fake university.

Xu Ling himself was a little shocked that the effect was so immediate after just a few hours of study.

But he wouldn't show it, and his face remained calm.

"Um... um, thank you, senior!" The girl took it for granted that Xu Ling was a senior student.

"Well, I'm a freshman." Xu Ling explained awkwardly.

"Ah? You're only a freshman, and you're so awesome!" The girl was a little bit unbelievable.

Xu Ling continued to criticize: "Are you also a freshman? Didn't you pay attention in class? The teacher has taught this kind of questions before."

The girl's mentality collapsed, she wanted to cry but couldn't, and she said weakly: "Well... I'm a junior, and I'm going to take the postgraduate entrance examination soon. I've forgotten a lot of the knowledge I learned before."

"Then you have to be careful." Xu Ling said seriously.

Ignoring Xu Ling's continuous attacks, the girl snatched the manuscript paper from Xu Ling's hand, turned around and left.

"Really? I just said that you didn't listen carefully in class, and you're angry already? Your mental quality is really poor!" Xu Ling said to himself while looking at the girl's back.

However, Xu Ling did not notice that when he finished saying this, the girl who had not walked far away staggered.

Even if they noticed Xu Ling, they wouldn't care, as he was just a passerby.

In the following time, except for eating, Xu Ling basically stayed in the library.

There are six volumes of the Demidovich Mathematical Analysis Exercise Book. During the eight-hour check-in time, Xu Ling finished two volumes in one go.

Just after receiving the mission reward, Xu Ling's phone vibrated. He opened it and saw a notification from his instructor, Wang Xueqin:

【Winter vacation officially starts tomorrow! 】

Indeed, the final exams have been over for a few days, so it’s time for a holiday.

Many students had already left, but Xu Ling's home was very close, in Shanghai, so he stayed in school, waiting for the official holiday.

However, before Xu Ling could relax, a notification sounded from the system:
"A new task has been released, please handle it in time."

new task!
Xu Ling was instantly excited and quickly opened the taskbar.

【Ordinary tasks

(1) Library check-in task

……

(2) Overtaking on a Curve: There are no holidays for top students! Please stay in school and study.

Completion Reward: Determined by the host's cumulative time on campus. The longer the time, the higher the value. After accepting the mission, the time count will begin at 8:00 AM tomorrow.

Failure penalty: None
Can I refuse: Yes
Total time: 0 days, 0 hours, 0 minutes]

Staying in school?
According to Xu Ling's previous character, he would definitely refuse without hesitation.

But now, Xu Ling has seen the temptation of the academic bonus pool and experienced the rapid growth brought by the system. Should he stay in school?

It doesn't seem to work either.

After thinking it through, Xu Ling decisively chose to accept it, then took out his mobile phone and made a call.

"Hey, Mom. The school is out for winter break, but I still have to stay in school for a few days to study!"

"You little bastard! I don't know who you are! You're just studying, who are you kidding?" a fierce voice came from the phone. "I'm really studying! I failed the exam before, and I have to study!" Xu Ling hurriedly explained, unexpectedly failing the exam became a perfect excuse.

"Then you decide for yourself! Come back early! It's close to home anyway, you can just take the subway back. That's it!"

"toot"

Before Xu Ling could reply, the person on the other end of the phone hung up.

Xu Ling's mother Xue Yan is from the north, and Xu Ling has long been accustomed to her carefree style.

The time spent at school was very pure. Xu Ling would receive the check-in task every day and then spend the whole day in the library.

Just because he studies hard has never made any profit, so two hours of concentration every day is Xu Ling's inevitable consumption.

Of course, the gains were very significant. Xu Ling finished all the mathematical analysis exercise books.

When he looked at the books again after finishing them, Xu Ling was surprised to find that the value of the books had dropped to 0.5.

Perhaps there were some knowledge points that he had not fully understood, but he no longer had the heart to review them as it was a waste of time.

In addition, Xu Ling also completed research on textbooks and exercises in theoretical mechanics, thermodynamics and statistical physics.

The value of the corresponding book was also raised to around 0.5.

However, this fulfilling campus life only lasted for a week before it was interrupted by a strong irresistible force.

Xu Ling's mother called.

"You little bastard! Why haven't you come back yet! Are you planning to spend the New Year outside? You have one day to get back here!" Xue Yan's roar was like a lion's roar, which made Xu Ling's eardrums hurt.

There is no way, I can’t disobey my mother’s orders!
Not even the system!
"I know, Mom. I'll be back this afternoon." Xu Ling responded helplessly.

That afternoon, Xu Ling packed his things and took the subway home.

After getting on the subway, Xu Ling opened the taskbar to check the task status.

【Ordinary tasks

(1) Library check-in task

……

(2) Overtaking on a curve
……

Total time: 6 days, 8 hours, 56 minutes]

The accumulated time stopped when Xu Ling stepped out of the school gate. It was neither long nor short.

Xu Ling immediately clicked to end the task, looking forward to the reward.

"Mission over!"

"Total time: 6 days, 8 hours, and 56 minutes."

"Task rewards are being drawn..."

What is it!
Xu Ling couldn't wait but was also a little nervous.

"Extraction completed!"

"Congratulations to the host for obtaining the supplementary materials for the mathematical analysis course: "Frontier Applications of Fourier Analysis""

Fourier analysis!
This is the last chapter of the mathematical analysis textbook. Although it is a bit difficult, it is what Xu Ling is most interested in.

Xu Ling was overjoyed for a moment. The system said it was cutting-edge, so it must be extraordinary!
With joy in his heart, the originally crowded and noisy carriage seemed to be filled with a harmonious atmosphere to Xu Ling.

……

"Ding dong!"

"We have arrived at Jiuting Station. Passengers who need to get off please get off from the left door in the direction of the train's travel."

When they arrived at the station, Xu Ling felt even happier.

(End of this chapter)