The night is still young, the dream is not awake

It became my favorite Chinese test paper and English test paper, and I wrote happily. When I finished writing the whole test paper, it was already [-] o'clock in the afternoon. Li Ai looked at the test papers that I brought. It was almost written, only the math and physics test papers that I hated were left, and finally I returned to the original math test paper and wrote painfully

Every question in the math test paper is about functions and calculus, which made Li Aitou very painful.

At [-]:[-], Wei Xiaoan took out the reading planner, ticked off the last item to be done today, turned his head, moved his body, and stood up. Li Ai, she patted the table lightly and said

"Do you need help?"

Hearing this, Li Ai nodded with a look of relief and said,

"want!"

Wei Xiaoan also heard it and went to Li Ai's side very simply. After seeing that she was troubled by calculus, Wei Xiaoan didn't help Li Ai solve the problem directly after seeing it, but asked Li Ai a very basic question. question

"At the same table! Do you know what calculus is for?"

"A math problem?"

"No! The reason calculus was invented is to calculate slopes and areas!"

"Why calculate slope and area?"

"Let's talk about the slope first! In this book, it is written that the slope can be obtained by differentiating the function. What is the use of the slope? Let me give you an example. Suppose one orange sells for five yuan, how much will two oranges sell for?" "

"Ten dollars!"

"Three?"

"Fifteen! It's that simple. My math in junior high and elementary school is very good!"

Seeing Li Ai's angry look, Wei Xiaoan smiled to comfort her and said:

"It's not over yet! Let's finish listening first! Do you know how I can write the description I just made into a function?"

"I know! It's not as simple as y=5x!"

"Then you know it! Let's change y to f(x), or it will become f(x)=5x. If we take a derivative of this formula, we can get a slope equal to 5, so it means the same as What I just said means the same thing, an orange has been sold for five dollars! So the differentiation is just to find out how many dollars an orange sells for!"

"is that so?"

"Hmm! If you use a mathematical formula, it becomes how many units y will move when x moves by one unit! Doesn't the translation mean that you can earn a few dollars when you sell an orange?"

"Really! It's amazing!"

"Don't be confused by this full of mathematical symbols! The purpose of mathematics is always developed to solve problems in life! So the explanation from life is the fastest and easiest to understand!"

"But obviously the things on this exam question are not as simple as you said!"

"That's just an extension of the example I just mentioned! If you understand the essential meaning, you will understand it better. Let's go! I recommend you to read a book and you will understand calculus better before doing it?"

"what book?"

"Just follow me!"

After that, because the appointment time is coming soon!After Wei Xiaoan and Li Ai finished packing their schoolbags, Wei Xiaoan went to the computer in the library to find a book called <<Calculus: Dragon Slaying Sword>>. After finding it, he picked up this book together with Li Ai's <<Inferiority I borrowed with transcendence＞＞together!

Li Ai, who lost the library, looked at the book about calculus in his hand and asked timidly:

"Are you sure I can understand this book?"

"I will understand it! This book is very easy to understand! But after reading it, you still need to do a lot of practice! You can ask me questions you don't know! By the way! We haven't exchanged mobile phone numbers yet. Let's exchange it!"

Looking at the mobile phone coming from the ground, this is the first time that Li Ai is a bit confused, but Li Ai still obediently typed in, and after typing, Wei Xiaoan also called Li Ai without any hesitation when he saw Li Ai actually I noted her on the phone and asked in surprise

"How do you have my cell phone number?"

This question made Li Ai panic instantly. After running his head quickly, Li Ai finally said something that Wei Xiaoan could trust.

"I got it from my mother! Last time I didn't call my mother with my mobile phone, so I got it!"

"That's it! I see! Then we'll live together like this! See you tomorrow!"

"Well! See you tomorrow!"

After arriving home, Li Ai breathed a sigh of relief and said

"Fortunately! I didn't write Wei Xiaoan's remarks too strangely! Finally, after thinking for a long time, typing the full name is indeed right!"

Because there was still some time before dinner, Li Ai went back to the room to read the book I borrowed today. Although I wanted to finish reading the book on the stele first, but I also thought of my dream of going to K University, so I resolutely decided to Put away that book, open calculus and start reading!

I thought it would be very difficult, but I didn’t think it was as difficult as my own, and I even wanted Li Ai to continue reading. Li Ai just read like this and even forgot dinner. It was her mother who came into the room and called her, she just remembered about dinner

Afterwards, after eating and finishing reading this book, Li Ai went to write the exam questions really smoothly, some basic exam questions are no longer difficult for her!town she knows exactly what to do

When it was finally time to go to bed, Li Ai felt that she was really moving towards her dream a little bit, and because of Jin Guo and Wei Xiaoan's talk today, she was more sure of the path she would take in the future, although the motivation for wanting to study K University was indeed true. It was for Wei Xiaoan, but the subsequent psychology was decided by herself. Since it was decided by herself, she wanted to make it to the end!And this does not conflict with my goal of winning Yang Junyu in the exam!

Thinking so, Li Ai took out his diary again and wrote on a new page in the diary:

Target: Psychology Department of K University

Short-term goal: win Yang Junyu in the exam

After finishing writing, I lay down happily on the bed and went to sleep

31. Graduation trip ([-])

With the passage of time, I finally came to Bi Lu, the most anticipated place in the second year of high school. Bi Lu is the last activity of the second year of high school. After Bi Lu is over, I will start preparing for the college entrance examination and live a hellish life, so everyone is looking forward to this event. Second high school last event

When she was about to board the tour bus, Li Ai was still thinking that it would be great if she could sit with Wei Xiaoan just like in her dream!But in reality it is not so easy to realize the wish, especially Yang Junyu is still so clingy to Wei Xiaoan

Wei Xiaoan originally didn't plan to sit with Yang Junyu. She originally thought that if she wanted to be numb, she would wait for Yang Junyu to sit by herself first. She finally chose the latter, because Wei Xiaoan felt that Yang Junyu might not sit down if she didn't sit down, but she didn't want to sit in the last row, so choosing the latter was a better thing, but Wei Xiaoan really underestimated Yang Junyu's will force

First of all, Wei Xiaoan first sat in the aisle seat as she planned, and then put a bag next door. He already showed that he wanted to sit alone, but Yang Junyu knew it after seeing it, but he didn’t admit defeat. explain

"Xiao'an! Would you like to sit over, I want to sit with you!"

"I get dizzy when I sit by the window!"

"That's it! Then I'll sit over and you let me pass!"

"I want to put my bag here!"

"Just put the bag on it! Let me sit there!"

There was really no way, Wei Xiaoan finally opened his mouth to tell the truth

"I don't want to sit with you!"

These words directly made Yang Junyu not know what to say, because the distance of the tour bus is very small, basically as long as Yang Junyu does not leave, no one can get through, but no one has the courage to ask Yang Junyu to get out of the way, except Bai Zehao

"Hey! Yang Junyu, let's go! Didn't you see that you blocked the way of the whole class! Sit or not! If you don't sit, go forward!"

When Yang Junyu heard this, he just gave Bai Zehao a look, then turned around and continued to confront Wei Xiaoan, as long as Wei Xiaoan didn't let him sit, he wouldn't leave!

When the teacher saw the blockage, he asked Yang Junyu to go forward after asking what happened, but Yang Junyu refused to do anything. The teacher turned his head and looked at Wei Xiaoan with sincere eyes. Wei Xiaoan had no choice but to get up and let him go. Yang Junyu came in and then sat down so that the rest of the class could pass

After Yang Junyu got the result he wanted, he also happily took out the food in his backpack and wanted to feed it to Wei Xiaoan, but Wei Xiaoan put on the earphones and closed his eyes and pretended to sleep. Although Yang Junyu was a little dissatisfied, he still endured it pick up the phone and come out to play

But what Yang Junyu didn't expect was that after all the classmates sat down, Wei Xiaoan immediately picked up the bag and sat in the space of the other two, which caught Yang Junyu off guard. Just when he was about to collect the backpack and sit with Wei Xiaoan, Li Ai saw it and walked over and said

"Xiao An, can I sit next to you?"

Although she was friends with Wei Xiaoan in her dream, in reality Li Ai is still a little scared. After all, she and Wei Xiaoan went to practice morning running before [-] years ago, but they still didn’t have much contact at school. "Student Li, congratulations to Babai for running once! Then you don't have to run with us in the morning again!"

Li Ai was very unhappy when she heard this again, but she subconsciously looked at Wei Xiaoan first, but Wei Xiaoan didn't say anything when she went, and Li Ai didn't go for a morning jog anymore!After that, the secret base originally said that we would come together again, but Wei Xiaoan never came with him. There were several times when Li Ai studied here and wanted to gamble to see if he could meet Wei Xiaoan, but she never came, so in reality Li Ai was still a little scared, but this time she really didn't want to see Wei Xiaoan's troubled expression again, so she walked over and said this without hesitation.

With the mood of being rejected, Li Ai wanted to say that she would not succeed, but Wei Xiaoan sat in and leaned against the corridor.