The image of Li Yan's straw bales of waste is deeply rooted in the hearts of the people, and other people in the classroom can't help but talk about it.

Occasionally, a few sentences popped up, "I've talked about similar questions before." ”

"It's not going to be hard."

"Luck, right?"

"Otherwise, I just read Nangong Yuhe's answer."

"It's fake to death."

In short, no one believed that Li Yan had this kind of strength.

Nangong Yuhe: "??? "He, he knows a ghost, he hasn't even had time to read the topic yet!?

Cai Lijun clasped her hands on her chest, turned her head and raised her chin to signal, "Next question." She had a remote control device in her hand, and the electronic screen quickly refreshed with new math problems.

Li Yan swept the question type, spatial analytic geometric trigonometric functions.

In the process of reading the question, the brain automatically calculated, and Li Yan gave the answer without thinking.

And when she gave her answer, the commotion in the classroom was even greater.

Because they hadn't had time to solve the problem, Li Yan had already opened his mouth.

？！

What's going on??

Cai Lijun pressed down again, differential geometry questions, the difficulty of the question type is of high quality.

Li Yan stared at the question, and it took about half a minute to calculate it.

Cai Lijun's eyes widened a little, and she completely straightened up, she pressed it on the remote control device again, and the answer and the analysis process were displayed in the next second.

And the answer that came out was exactly the same as what Li Yan said.

This group of people is not calm.

They just finished reading the question, and Li Yan had already finished answering?

What kind of operation is this?!

To be able to enter the cold class, they naturally have their pride, they are all the pride of the sky, and it is naturally impossible to admit that a waste vase is more powerful than them.

So when Cai Lijun opened the blackboard, extracted chalk, and went into battle to solve the complex problem in person, their eyes were engrossed in the topic.

Scratch paper, pen, already in place.

Here, Nangong Yuhe saw that Li Yan was not prepared, so he pushed his notebook and pen over.

Li Yan glanced at it and smiled, the curvature of the corners of his mouth was a little arrogant, "No, you can keep it for yourself." ”

Cai Lijun came up with two questions, she wrote very large characters, and used two blackboards.

One is algebraic geometry, and the other is the complex function of hell mode.

As we all know, algebraic geometry has always been the pinnacle of mathematics, and complex and changeable functions are also the main culprits that make people bald.

It can be seen that Cai Lijun is serious.

Li Yan's hand grabbed the little yellow duck plush, and answered the question: "Yixiao uses the Cauchy formula of the nth derivative to prove ......"

"Two small, using the Cauchy formula expansion of f'(x) to obtain ......"

"Three small use of the average value formula ......"

She was serious when she answered the question, her face was as white as jade, the face carefully carved by the Creator, the curves could be soft or sharp, and the slightly raised chin was beautiful and indescribably attractive.

In particular, her voice dragged a lazy magnetism, gorgeous and pleasant, like a fox demon with a thousand-year-old Taoism, which made people's hearts tremble.

Questions like this generally only appear in the last big question of the test paper, and the vast majority of people are unable to solve them.

Li Yan began to calculate the second problem, she stopped thinking for a while, held the elbow of the other hand with one hand, and stroked her fingers on the vermilion tear mole.

The lips that were as red as roses were lifted, "The answer is...... 1 minus a 2π squared. ”

The god of study in Shenghan's class is Shen Yunheng, and it is Huo Jin who is nicknamed the second oldest in ten thousand years.

The two were still calculating when Li Yan reported the answer, and even Cai Lijun was verifying it after finishing the question.