Teacher Xu, Please Take Care of the Reckless Students in Your Class

He even began to wonder if he saw people through the cracks of the door and questioned them, which led to the current situation.

Zhao Kailong, "Director!"

Zhang Ruiyun came back to his senses, "Mr. Xu, do you have any opinion on testing them?"

Xu Heng smiled, "I have no opinion, but I have a request, and ask a few teachers to make the problem a bit more difficult."

Several math teachers, "!!!"

"Mr. Xu, did we hear it right?"

"The question is so difficult, they won't, and you have no face!"

"Yeah! We still know a little bit about their level, so..."

Xu Heng interrupted these teachers, "It's useless to talk too much, hurry up and ask questions! I'm still in a hurry."

When all the students heard Xu Heng's words, they immediately said, "Hurry up with the question! Didn't you hear Mr. Xu in a hurry! The question is easy, we won't do it!"

The teachers gritted their teeth.

his!

The same teacher!

Why is the gap between us and Xu Heng so big?

"Okay! Wait a minute!"

"With your attitude, we don't have any problems, and we all feel sorry for you!"

"I'll come first, I just have a question!"

The teacher wrote on the spot:

已知二次函数f（x）=ax2+bx+c的导数为f’(x)，f’(0)＞0，对于任意实数x都有f(0)≥0，则f（1）/f’（0）的最小值为……

The title has just been written, and suddenly a female classmate said, "2...is it 2?"

Geek!

In an instant, the teacher who asked the question stopped, and he was trembling all over.

Zhao Kailong, "What's wrong? Is the answer right? Don't be stunned!"

The teacher took a deep breath, "This is a multiple-choice question for the final year of the college entrance examination! I am a multiple-choice question. She knows the answer before I write my options?"

"This, this, this..."

brush!

Suddenly locked the girl, she was not tall.

Rely on!

Still a classmate taught by this teacher!

When she was a freshman in high school, every time she took a test, her math was in single digits, and sometimes she even handed in blank papers!

"Impossible! It's impossible! How can you guess right! Are you fooled?!"

clap la la...

Several teachers were also stunned.

The answer has been snatched up!

And it's still right!

"Mr. Zhao, you have met a baby! The answer is 2! It's really 2!"

Zhao Kailong vehemently denied, "Why did I meet a baby? This is either a blind cat meeting a dead mouse! Or she has seen the answer to this question!"

"I'll come out with one!"

Zhao Kailong was about to start writing.

Wei Minghai, "We're in a hurry, just say it!"

The veins on Zhao Kailong's forehead jumped violently, "Okay! Good! This is what you asked for!"

"Listen to the question! The distance from the end point a of the second hand of the clock to the center point o is 5 cm. The second hand rotates evenly around the point o. When the time t is equal to 0, the point a coincides with the point b marked 12 on the clock face, and the a, The distance d between two points b is expressed as a function of t, what is d?"

"The unit of d is centimeters, t is seconds, and t here is between 0 and 60!"

The voice didn't fall...

That girl, "10 times sin (πt divided by 60)."

fast!

It's almost time to drop the sound at the same time as Zhao Kailong!

Ding!

In the small conference room at this time, the needle drop could be heard.

ps; thanks [nuts! ! 】【Better to die than a blank ticket】The reward!