Chapter 145

Two hands, raised almost in no particular order, at the same time.

One person, not surprisingly, was Bi Qi, who was sitting in the first row.

The other person was Bai Yao, who was sitting in the back row, staring at Gu Lu with eyes as bright as stars.

Bi Qi looked at Gu Lu with a longing look on his face, looking forward to it.

"Teacher, call me. ”

In order to avoid Gu Lu being confused by beauty, Bi Qi did not turn over his brand, so he made a silent mouth gesture at Gu Lu.

Gu Lu smiled, "Then Bi Qi, you!"

"Thank you, teacher. Bi Qi excitedly walked to the podium, picked up the chalk, touched his chin and pondered for a few seconds, and then wrote down the steps on the blackboard step by step.

[If cosθ≠1, so that x1=cosθ+isinθ, x2=cosθ-isinθ, then x1, x2 are the two roots of 1-2xcosθ+x^2=0.

So there is: 1/1-2xcosθ+x^2=1/x1-x2(1-1/x-x1-1/x-x2)=......]

Five minutes later, Bizzie finished writing the last formula, put the chalk head down, and patted the chalk foam on his hand.

Pretending to be done!

Ahem...... No, can the matter of reading people be called pretending?

It should be the answer to the question!

In the whispered exclamations of the chatter of several students below, Bi Qi sat back in his position with an indifferent expression.

"Bi Qi, amazing!" Zhang looked at the more than 20 lines of solution formula written by Bi Qi on the blackboard and gave a thumbs up.

Although I couldn't understand what Bi Qi wrote, just looking at the dense formula, Zhang Zhan had a feeling of uncertainty.

I don't understand, but it doesn't stop me from shouting 666!

Bi Qi waved his hand, "Basic operation, don't make such a fuss, it's just a basic operation." ”

"This is just the basic exercise, so how will you exert your full strength?" Zhang Zhenzhen was a little curious.

The corners of Biqi's mouth rose, "In the future, you will have a chance to see you." ”

For all four questions, Gu Lu found someone to do it.

Gu Lu opened his mouth and said, "Next, I will talk about these four topics in order. Because some students have not completed the preparation of the whole textbook, some of the content I am talking about may not be understood. So I'll go through it roughly, everyone understands it best, and it doesn't matter if you don't understand it, I'll explain it in detail later when I talk about the main class. ”

After speaking, Gu Lu went through the first three questions first.

All three students answered correctly, and there were no major mistakes in the steps of solving the problem.

Gu Lu praised the three classmates, and then he finished the three questions in about ten minutes.

When explaining the topic, some students in the audience, because they had done more than enough preparation, could keep up with Gu Lu's lecture speed, and nodded frequently while listening.

And the other part of the classmates.

can only look at the ceiling with empty eyes, listening to Gu Lu's lecture as if listening to a book from heaven.

I know what integrals and definite integrals are, but what calculus is.

I know the law of Lopida, but what exactly is the mesovalue theorem?

And the entrapment theorem!

The name is a little familiar, but in which chapter does it appear?

This part of the students was full of regret.

If you knew this, you wouldn't waste a lot of time on liver games, and how good it would be to carefully preview the textbook.

But now it's too late to regret it.

They could only look enviously at the students next to them who could understand what Teacher Gu was talking about, and at the same time record what Gu Lu said on the stage as much as possible, and slowly understand them in the future.

"Let's move on to the fourth question. Gu Lu pointed sideways at the blackboard, and was just about to start speaking, when he saw a small white hand raised high.

"Bai Yao, is there anything wrong with raising your hand?" Gu Lu's gaze fell on Bai Yao.

"Teacher, I have a completely different solution to the last question than Bi Qi. Bai Yao glanced in Bi Qi's direction.

Hearing this, Bi Qi subconsciously turned his head and looked at Bai Yao.

Bai Yao didn't show any timidity, her face showed cute little dimples, and she stared at Bi Qi with a smile.

"Different solutions?" Gu Lu smiled and raised his eyebrows, and as he walked off the podium, he stretched out his hand to Bai Yao and motioned, "Go up and write it down." ”

Bai Yao glanced at Bi Qi provocatively, and then walked briskly and came to Gu Lu.

Bai Yao stared at Gu Lu directly, as if she was waiting for something.

Gu Lu was a little confused, and subconsciously took a few steps back, "What are you doing?"

Bai Yao stretched out her little hand, "Teacher, where's the chalk?"

"Chalk on the lectern, if you can't hold it yourself. Gu Lu couldn't laugh or cry.

"But didn't you just hand out chalk to everyone. Bai Yao muttered quietly.

Gu Lu had a black line on his head and decisively refused, "Men and women don't kiss." ”

Bai Yao raised her head and wondered, "Then the man can kiss?"

Gu Lu: "......"

In the end, it was Bai Yao who deflated her mouth, walked up to the podium in disappointment, took out the chalk in the chalk box, turned around and wrote her own steps on the blackboard.

"Poisson integrals?" Gu Lu looked at the steps written by Bai Yao and pondered slightly.

Bai Yao had obviously already thought about the steps to solve the problem below.

In less than two minutes, the solution steps were written.

I don't know whether it was intentional or unintentional, Bai Yao better wrote the steps to solve the problem on the right side of Bi Qi's answer.

In this way, the students below can see the obvious contrast at a glance.

Let's not talk about handwriting.

It's no longer normal for a boy's handwriting to be inferior to a girl's.

Just about the length of the formula.

Bi Qi's answer took more than 20 lines of formulas to solve the result, while Bai Yao's answer only used a dozen lines of formulas.

The students below can clearly see at a glance that Bai Yao's answering steps are simpler than Bi Qi's.

Bi Qi is very angry!

He watched as the worship values that had just been brushed out of his classmates were instantly transferred to Bai Yao.

That feeling is worse than losing millions.

Bai Yao patted the chalk ash on her little hand, and her smiling gaze fell on Bi Qi in front of her, "Bi Qi, what do you think of my way of solving the problem?"

Shrimp pork heart!

It's really murderous!

Although he was defeated, he could not lose in momentum.

Bi Qi barely squeezed out a smile on his face, "Yes, very good, I'm ashamed of myself......!" Hehe. ”

"It's okay this time, you don't need next time. Bai Yao walked off the podium with a smile.

She just wasn't convinced, why did Gu Lu turn over the Biqi brand instead of her own.

Just because Bi Qi has known Teacher Gu for a long time, is it Teacher Gu's "good old friend"?

Hum!

Say yes about fair play!

You secretly cheated and got into an old relationship with Mr. Gu, so that he could flip over your brand.

Bai Yao, who was angry, could only vent his resentment on Bi Qi!

………………

PS: Sorry, it's only now that the class is over, and the update is a little late.

There's another chapter later.