My school flower beauty president

Chapter 209 Bai Siyun!

Chapter 240 Two Bai Siyun!

June 2016, 22, one day before the belated college entrance examination.

At noon, Ye Xietian was still alone in the library of No. [-] Middle School. This time, he didn't have a large pile of textbooks in his hands, only six books, mathematics, mathematics, or mathematics, all from the first year of high school to the third year of high school. He brought all the math textbooks.

From the first volume of the first year of high school, he quickly flipped through the pages of the books. It took him less than 5 minutes to read one book, then closed his eyes and started to memorize quickly.

After memorizing, he read it again, and then read it again, and repeated it until the fifth time that he stopped to pick up another book.

For other people, it may not make any sense to do this, but it is different for him. He has a memory that is difficult for others to have.

Otherwise, when his father took him to Wudang, he wouldn't have memorized the complete Da Huang Ting in an hour, with a total of [-] characters, word for word, which won the praise of Jiu Dao Patriarch.

"I thought who was doing such a weird thing here. It turned out to be you, what? Is rote memorization useful? I never came to No. [-] Middle School, and the class time is less than ten days, so you still want to be admitted to the top prize." At this time, Li Yan and a girl came in, and seeing that it was Ye Xietian, Li Yan said with a look of hatred.

And the girl standing beside her looked at him curiously, her bright eyes of wisdom flickered, she didn't know what she was thinking.

"Well, principal, to tell you the truth, it's really useful." Ye Xietian said with a smile. At this time, he had already picked up the math book for the third year of high school and began to read it.

He watched there for 5 minutes, and Li Yan and the girl waited there for 5 minutes. It wasn't that Li Yan didn't want to leave, but the girl smiled and shook her head at him.

After 5 minutes, Ye Xietian closed his eyes and began to digest all the knowledge points of the third year of high school.

At this time, the girl stepped forward and asked Ye Xietian who was meditating with his eyes closed: "The coefficient of the quadratic term of the quadratic function f(x) is negative, and for any real number x, there is always f(x) =f(4-x), if f(1-3x^2)<f(1+xx^2), find the value range of x?"

"From f(x)=f(4-x), we know that the quadratic function is symmetrical about x=2
The coefficient of the quadratic term is negative, and the parabola opens downward

由f(1-3x^2)<f(1+x-x^2)可得
|1-3x^2-2|>|1+x-x^2-2|
即|3x^2+1|>|x^2-x+1|，3x^2+1>x^2-x+1
2x^2+x>0、x>0或x<-1/2
So the value of x is (-∞, -1/2)∪(0, +∞). "

At this time, he opened his eyes, looked at the girl, blinked and asked, "Am I right?"

"Question 27 on page [-] of Senior Three Volume One, your memory is really good." The girl said with a smile, with a hint of surprise in her bright eyes.

"You are also very good." Ye Xietian replied with a smile.

"Do you have time to play a game of chess?" The girl asked with a smile at this time.

"Chess, military chess, or backgammon?" Ye Xietian said playfully to her with a frivolous smile on his lips.

The girl frowned, she hated other people talking to her in such a frivolous tone, she said impatiently: "Chinese Millennium Chess, Go."

"I don't have time, and I still have to take the champion exam." Ye Xietian raised his eyebrows and said directly.

"If you don't play a game with me today, I will tell the people in the Education Bureau that you will not know the questions, and you will memorize the answers. Don't doubt my ability." The girl said coldly.

"I don't doubt it. After all, our principal is the best proof." Ye Xietian smiled, but still said: "I'm sorry, I haven't finished my textbook yet, so I can't accompany you."

"Boy, don't bring it up to me when you two talk about things." Li Yan couldn't help saying when he heard Ye Xietian's words at this time.

"You accompany me to the next game. You don't need to do anything if you lose, but if you win, I can teach you all your science subjects. And I can guarantee that you can learn all of them." At this time, the girl Said.

"Why do you make me believe you?" Ye Xietian asked faintly with a sly gleam in his eyes.

"Just because my name is Bai Siyun." The girl said coldly.

"As far as this world is concerned, those who hold laurel with thoughts of clouds are ashamed. The IMO first prize, the first Huaxia talent in the world to win the first place for three consecutive years in the US Invitational, and the Hua Luogeng Gold Award, almost swept all the international Olympiads. Large and small trophies, known as the young Hypatia by the International Olympics! At the same time, she is also the only ten-dan Go master known and registered by the World Chess Federation."

Ye Xietian smiled, and he said: "You do have this ability, but you are already a ten-level Go master, is it necessary to compete with me, an amateur non-professional player?"

"Or not?" the girl asked in a cold voice.

"Excuse me, since the conditions are so attractive, why should I delay?" Ye Xietian stood up, put the books on the shelf next to him, stretched himself, and said with a smile.

……

(End of this chapter)