Chapter 15 Advanced Mathematics

Gao Ming looked at Wu Tong again. Children who love to study are always popular. She couldn't help but say, "Child, are you going to participate in the competition? If so, you don't have to buy it. Go down Renhe Avenue and you will find the county library. There are these textbooks there. You can apply for a borrowing card with your ID card and borrow them directly!"

These are university textbooks. For students who only need them temporarily and will receive them when they go to university, buying them is not a very cost-effective thing. The library has comprehensive textbooks and it is easy to borrow them, so it is more appropriate.

Wu Tong slapped her head, thinking that she was thinking wrongly. How could she forget about the library?

As the face symbol of the county's culture, the county library has a rich collection of books. There may not be any rare books, but there are still many books for the general public, covering various aspects. Comrade Wu often borrows books on agriculture and machinery from the county library. How could she forget this?

It seemed like the teacher once said that they could also borrow books from the library with their student ID cards.

Given her reading speed, buying books is not a wise decision. Her family's money is earned by her parents' hard work, so it's better to save as much as possible instead of wasting money unnecessarily.

Wu Tong sincerely thanked Gao Ming: "Thank you, Auntie!" She was really grateful to this auntie.

"Don't be polite. The textbooks you want are bought by very few people in the county, and our store doesn't have much in stock. My child is about the same age as yours. I would be very happy if he could love studying as much as you do!" Gao Ming waved his hand. She was just making a casual remark.

Wu Tong went out and turned to ride her bike in the direction she came from. The library was at the other end of the same avenue as the No. 1 High School, which was actually quite close to her home. The county library was not too big, a three-story building that also included office areas for staff and warehouses.

Wu Tong had been here before, but at that time he was just a small appendage of Comrade Wu. He came here purely for fun and to read some story picture books.

Wu Tong was also not very familiar with this place, so he went straight to the administrator for consultation as soon as he entered.

There weren't many people in the library, and it was one of the few quiet places in the county. The administrator had very little time, and most of the people who came here were familiar faces, and they were very clear about the layout and their needs, so they were basically not needed. Their work was more about registering books and tidying up the environment.

It was a rare occasion that someone came to ask about this, and the administrator was quite enthusiastic: "The advanced mathematics you want is on the third shelf in Area D. Books like university mathematics are all in that area!"

There were people reading in the library, and the two of them were talking quietly. Wu Tong followed the instructions, went to Area D, and found the textbook she wanted.

Advanced mathematics, analytic geometry, linear algebra... She took a look at the advanced mathematics first. The content was quite profound. She had completed high school mathematics, but it was still a bit difficult at first glance. If she wanted to fully understand it, she would have to enter a deep learning state to better study and understand it.

Wu Tong took three textbooks, including analytic geometry, linear algebra, and advanced mathematics, to the registration office to register. She had just asked that the books could be borrowed for half a month. Although there were still many books on mathematics on the bookshelf in Area D, Wu Tong was not greedy. She took three books to study first, and then changed to other books after she had thoroughly understood them.

When she first came into contact with these advanced mathematical knowledge, she reserved more time for herself and then adjusted her borrowing strategy according to her own progress.

After leaving the library, Wu Tong couldn't help but use the side of a book to block the direct sunlight from the floor.

The weather in September was still hot, and she had just come back and forth, eager to borrow books, and hadn't felt much. Now that she had come out of the cool and icy library, the sun was particularly glaring.

Fortunately, this was built the earliest, and the big trees on both sides of the road can block the sun, otherwise people would not have the courage to go out.

On the way, Wu Tong bought herself an old popsicle to cool off. At this moment, she only wanted such a refreshing taste. In her memory, the summer weather would only get hotter and hotter every year. She still had to practice the Chaoyang Ziqi method well to cultivate the state of being immune to cold and heat.

"Tongtong, you're back. Have you eaten?"

Wu Jingzhong heard the door open and leaned out of the kitchen. Teacher Jin Yu had a meeting before leaving work in the morning, and she had just returned home and was resting in the living room.

"Are you feeling hot? Sit down and cool down. Dad will open some watermelon for you to eat first!" He was taking a day off from work today, so he went to the morning market to buy some small hanging watermelons and put them in a cool place in the room so that they would be refreshing when he ate them.

This small watermelon has a thin skin and sweet flesh. It is not difficult for one person to eat one. It is best to cut it in half and eat it with a spoon. Wu Tong has always liked it.

"Don't blow towards the air vent, or you'll get a headache!" Jin Yu reminded him immediately. Wu Tong came back feeling hot and liked to stand in the air vent to cool off, which was the easiest way to get sick.

"I know!" Wu Tong took the watermelon handed over by her father, took a bite and put it into her mouth. Then she opened her wallet and handed the money her parents gave her for buying books in the morning back to Teacher Jin.

"Didn't you have time to go to the bookstore today? Take this and use it to buy books later!" Jin Yu handed the money back. The money spent on her children's studies was the expense she cared least about.

"I was wrong. I can borrow the books I want from the library. Today, a kind lady in the bookstore reminded me about the library!" Wu Tong was eating watermelon and waved her hand, asking her mother to take the money back. She found a more convenient place and didn't have to spend money.

"I've already borrowed it!"

After hearing what Wu Tong said, the couple obviously understood that the child had gone to the bookstore and then to the library. In this way, their daughter had been running back and forth on the road all the time, so she had no time to eat. The two felt sorry for the child, and Wu Jingzhong hurried to the kitchen to serve Wu Tong and Teacher Jin. He was at home today, and he was the chef at home.

The couple has a good relationship and has been following a consultative mode since their marriage. Washing, cooking, cleaning, shopping, etc. are all done by whoever is more convenient. In terms of work nature, Wu Jingzhong is closer to home and has more regular hours. Wu Tong has cooked more for Wu Jingzhong since she was a child, and has mastered good cooking skills.

Wu Jingzhong never shirks his responsibilities when it comes to household chores.

After dinner, Wu Tong chatted with his parents and then returned to his room, connected to the Enlightenment Stone Stele, and entered a state of deep learning.

Wu Tong opened the advanced mathematics book she borrowed. It was the sixth edition of Tongji University, which was published two years ago. The content of the first chapter caught Wu Tong's eyes: Functions and Limits.