young sir

interval...

Wait, monotonic intervals?

Bi Ziyun's eyes were fixed on this big 12-point question. There were three sub-questions in this question, and the conditions were all written on the question stem.The numbers in the question stem looked familiar to him no matter how he looked at them.

He had done the original question before and got it wrong.

A while ago, because Fang Nan said he didn't work hard enough, he happened to have a cold war with Fang Nan.In a fit of anger, he moved all the five big questions that he did wrong that day to the wrong question book, and went to find the representative of the math class to give a lecture.

He also deliberately discussed with the class representatives very loudly in the classroom, just to let Fang Nan hear.

Even if you can't solve the problem, I won't look for you, cut it.

Bi Ziyun picked up a pen, and carefully wrote the word "solve" on the answer sheet stroke by stroke.

It seems that the favor of the god of learning has really manifested itself.

After leaving the second examination room, he saw several people standing at the entrance of the first examination room next door.As soon as Fang Nan came out of the examination room with a pencil case, the group of people at the door quickly surrounded him, and it seemed that they all came to find Fang Nan's answer.

Seeing that Fang Nan would be unable to get away for a while, Bi Ziyun didn't plan to take the initiative to find him.He walked through the corridor to the bathroom, but unexpectedly bumped into Song Huaishu at the door of the men's bathroom: "Uncle, how did you do in the afternoon exam?"

"The question is a bit difficult, but it feels okay." Uncle Huai said, "It's a pity that the last question is a bit pity. Give me a few more minutes, and I will definitely be able to solve the third question."

Hearing what Uncle Huai said, Bi Ziyun felt a little terrified.In this math final exam, although he still had a lot of questions that he couldn't solve, he managed to solve all the big and difficult questions.

"You said 22 questions? I have done the original question for this question before, and the final result, the maximum value should be equal to 2."

"Yes, you!" Song Huaishu raised his eyebrows, and made a "666" gesture to Bi Ziyun, "This question has the most points, and it is estimated that not many people can solve it. It seems that you are lucky this time. "

"That's not true," Bi Ziyun rubbed the back of his head happily, "It's the first time I encountered the original question in the exam, and it's thanks to you and Xueshen's auspicious words yesterday."

After chatting for a few more words, Bi Ziyun was about to go home and review for tomorrow's comprehensive essay exam, and the two said goodbye at the stairs.

In the cafeteria, Song Huaishu and Fang Nan had a meal, and sat down by the window as usual.Song Huaishu had just gnawed a big mouthful of chicken legs, and his words were still vague: "Well, Brother Nan, have you solved the last big problem this afternoon?"

As soon as he said the words, he regretted a little.

What is the question I am asking? Brother Nan can even get No.1 in the math competition. Such a topic must be pediatrics for him.

"Well," Fang Nan said, "the maximum value is 1."

The expression on Song Huaishu's face seemed to be choking, he beat his chest and coughed heavily.

Seeing that something was wrong with Uncle Huai, Fang Nan immediately handed over the mineral water on the table: "What's wrong with you?"

Song Huaishu drank several sips one after another, and it took a long time to calm down: "Brother Nan, isn't the answer to this question 2? Bi Ziyun told me that he has done the original question..."

"Bi Ziyun told you that he did this question before?" Fang Nan frowned and repeated what he said just now.

"That's right." Song Huaishu was a little confused.

"That's his mistake." After a while, Fang Nan said.

"I've seen the question he said before. The conditions given in the first question are different from this test, so it's not the original question."

"...Also, even if it is really the original question, the maximum value is not equal to 2. 2 is the answer he calculated when he made a mistake last time."

"Then... Bi Ziyun won't have lost points for this question, right?" Song Huaishu asked cautiously.

"It should be gone." Fang Nan put down the chopsticks in his hand, "Does he think he did the right thing?"

Song Huaishu couldn't bear it and nodded towards Fang Nan: "Besides, Bi Ziyun was having fun there all the time, and even said that he borrowed your good words."

Fang Nan: "..."

It’s over.

He told Bi Ziyun yesterday that he would definitely pass the exam if he kept the exam.

This is not showing favor to Bi Ziyun, it is simply poisoning him.

English and comprehensive literature are not Bi Ziyun's strong subjects, but they are not a big problem for him.

After finishing the two-and-a-half-hour comprehensive essay, the first semester of the second year of high school is over.Originally, he would come to listen to the teacher comment on the test papers next week, but he was going to the provincial capital to participate in the training camp before the violin competition, so he and Brother Pi had already asked for leave.

After leaving the examination room, Bi Ziyun waited for a while at the door.He wanted to say goodbye to Fang Nandao before going home.

He stood at the door for several minutes, but the door of the examination room was never opened.Just as Bi Ziyun was about to turn around and go downstairs, she met Rebecca who was going upstairs at the stairs.

Rebecca transferred to the International Department of Gu Nan as soon as she started her sophomore year of high school, to prepare for studying abroad after graduation.The International Department is not located in the Gunan Campus, but has built several buildings in the suburbs.Therefore, since the second year of high school, Bi Ziyun rarely saw her again.

Although the International Department majors in courses from foreign schools, it also needs to minor in other subjects.Seeing that Rebecca was holding a pencil case in her hand, she should have just finished the comprehensive examination in the examination room.

The two met by chance at the stairs, and Bi Ziyun couldn't avoid it in time. He just wanted to say hello to her politely.Unexpectedly, Rebecca's eyes lit up when she saw him in front of her.

"Hi, Bi, long time no see!"

Rebecca was still as enthusiastic as ever, and gave Bi Ziyun a big hug as soon as she came up.Only then did Bi Ziyun realize that Rebecca was followed by a tall boy with a spiky head and a bone chain hanging around his neck.

Seeing Rebecca hugging Bi Ziyun, Hedgehog's face looked a bit unhappy.

"Bi, this is my boyfriend Lucas, Lucas, this is the Bi Ziyun I mentioned to you before." Rebecca turned her head to the hedgehog and said, "Bi's violin is very good, you should really if you have the chance listen."

"Bi, we're going to have a pool party on the top floor of the Longwei Hotel tonight, and you're bringing your friends?" Rebecca asked him.

Hearing what Rebecca said, Bi Ziyun quickly waved his hands: "Well, I have something to do tonight, I'm going to—"

The hedgehog boy's eyes were too scary, and the expression on Rebecca's face was very sincere. He stuttered for a while, and suddenly didn't know how to say no.

At this moment, the door of an examination room opened.

Fang Nan was the first to hand in the test papers and walked out of the classroom.After he left the examination room, he walked towards the next room, and saw Bi Ziyun and Rebecca at the stairs.

Seeing that Bi Ziyun was staying with Rebecca, they seemed to be having a happy conversation.Fang Nan's footsteps paused slightly, then he turned around and walked back.

Damn, how can this person prepare to leave without saying a word?

"Hey, Fang Nan! Hey—" Bi Ziyun yelled at the people in the corridor, "Wait, yes, come here!"

Fang Nan turned his head and found that Bi Ziyun not far away was looking at him for help.

Seeing Fang Nan finally turned back, Bi Ziyun pointed to Fang Nan who was not far away, and said to Rebecca apologetically, "Rebecca, I'm really sorry. Today is my friend's birthday, and we are going out for dinner tonight. Maybe not this time, but next time."

"Okay, let's make an appointment next time." Rebecca was quite magnanimous, and then smiled at Fang Nan who was standing behind Bi Ziyun, "Are you Fang Nan? I remember you, so I won't say much , Happy birthday to you today."

"Thank you."

Fang Nan said to Rebecca.

He asked Bi Ziyun with his eyes, birthday?who?

Bi Ziyun secretly made a mouth-shape: You.

When Rebecca and her little boyfriend went downstairs to leave, Bi Ziyun finally breathed a sigh of relief: "...Americans are too enthusiastic, did you see the look in her boyfriend's eyes? She just talked to me in front of that man. Hugs, if looks could kill, I think I'd have died [-] times."

Fang Nan: "She has a boyfriend?"

"Yeah," Bi Ziyun said, "What's wrong with having a boyfriend?"

"It's nothing." Fang Nan said.

Uncle Huai made an appointment to play basketball after the exam today, and the standard lineup of three people became two people.

On the way out of the school, Bi Ziyun kept wanting to say something to Fang Nan, but every time the words got to the point of his mouth, he swallowed them back.Although the relationship between him and Fang Nan was not as stiff as before, there was always something wrong between the two of them, which made it impossible for them to return to the natural state of getting along at the beginning.

The winter vacation is not long, but it is not short.Thinking of not seeing Fang Nan for the next whole month, he felt a little inexplicably upset.

As soon as the two of them reached the school gate, a red Porsche parked on the side of the road rolled down the window. Su Lijuan's delicately made-up face poked her head out from the co-pilot of the Porsche: "Son!"

Immediately afterwards, the door of the Porsche was opened, and the mother picked up the little cousin Huihui from the back seat, and walked out of the car with Aunt Li.

Hui Hui wore a princess dress of Ba La La Xiao Moxian today, with a small plastic wing on her back, as if she was playing wildly in an amusement park just now.

Seeing Bi Ziyun and Fang Nan standing at the school gate, Huihui broke free from Su Lijuan's embrace, opened her little hands and ran towards them.

Bi Ziyun was about to reach out to catch her, but Huihui plunged into Fang Nan's arms beside her without saying a word.

Huihui hugged Fang Nan's waist, rubbing her head against his clothes like a kitten: "Brother Giraffe! Hug—"

Fang Nan stared blankly at the little girl in his arms, not knowing where to put his arms and legs.

Seeing that Huihui was making trouble again, Aunt Li hurried towards the two of them.