Of course, Chu Tianmian himself is also more and more bottomless the more he writes.

It's the same as the multiple-choice question with four answers: 1, 2, 3, 4, and she calculated that the answer was ³√648.

When she stopped her pen and began to look back, Zou Yong on the side had just finished writing the last step.

"Teacher, I'm done."

Li Lu walked over and glanced at it, and nodded approvingly.

"Yes, the approach is correct and the process is well documented. You can use it as a reference answer. ”

This made Chu Tianmian even more unable to think, and his brain was gradually a little blank.

Han Bing couldn't help but lower his head and cursed secretly:

"Conspicuous bag."

Li Lu turned her head to look at Chu Qianmian's progress again, and saw that she pursed her lips and seemed a little nervous, so she spoke out to reassure:

"Students who haven't finished it yet, don't worry, think slowly."

Su Chengyi looked at Chu Qianmian's back and suddenly raised his hand.

"What's wrong?"

Li Lu was a little surprised when he saw him raise his hand at this time.

All the students in the classroom followed her eyes, and Su Chengyi put down his hand, pulled out a chair and stood up.

"There are other ways I'd like to share."

"Oh, welcome, welcome."

Li Lu applauded cooperatively, and the others applauded as well.

Walking to the podium, Su Chengyi glanced at the process of Zou Yong's writing.

Anyway, there is a feeling of detail for the sake of detail, and many steps that are not necessary to be written have to be written.

The blackboard is a push-pull transposition design, Su Chengyi didn't move, and pulled the clean side in front of him.

He didn't write in a hurry, he coughed a little deliberately, and Chu Tianmian next to him immediately raised his eyes like a frightened deer to look at him.

... What is the reaction?

I don't think I came up to laugh at her.

With his fingers tapping lightly on the blackboard, he raised his hand and wrote:

（AD/AM）(sinx/sin(x+B))

Chu Tianmian saw that what he wrote was part of his steps, and he was stunned for a moment, and compared his own, only to find that the process was written wrong from the beginning, and quickly turned around in a panic to take the board eraser.

Seeing that she had already understood, Su Chengyi directly erased the formula she had written with her hands.

Then he wrote a "one" slowly.

"First, take the corner of triangle ABC as the basic quantity, calculate CP first, then PM, and finally MQ."

"From the sine theorem..."

Su Chengyi put one hand in his trouser pocket, and the other hand wrote the equation smoothly, with almost no pause during the period.

Everyone under the podium was a little stunned, including Li Lu.

Even if she is asked to do this question, she needs to write it while looking at the picture, otherwise it is very likely that she will read the wrong point or side letter.

"If ∠BCQ=∠BAC, then the above conclusion is valid."

"The next step is to state that the point Q that satisfies the above conditions is unique."

"I can write about five ways to prove this precondition. I probably can't write about the whole process here, so I won't write it yet. ”

Su Chengyi didn't look back, and listed five small serial numbers on the blackboard.

"They are the same law, monotonicity, cosine theorem, column equations. Of course, you can also choose to explain directly. ”

As he said this, there was a sound of note-taking under the podium.

After Chu Tianmian corrected the mistakes pointed out by Su Chengyi, he was empowered and quickly finished writing his own methods.

As soon as I turned around, I saw that Su Chengyi had already written another method on the blackboard, and when she was following his steps and thinking, the other party raised his hand and wrote down another "two".

"The diagram on your side is clean, so borrow it."

Su Chengyi raised her hand to draw auxiliary lines on the drawing on her side.

"Let ME cross AB at point H, then MH=HE."

“......”

"It can be directly proved that the triangular QBC is similar to the triangular HMA."

took a step back and looked at his own process, and before everyone could react, Su Chengyi changed to another color of chalk.

"3. Make the midpoint N of BC to prove that the triangle CNQ is similar to the triangle ABC."

"To calculate NQ/NC, I currently have two methods..."

After this operation, everyone was already dumbfounded.

But for Su Chengyi, it is just the beginning.

"Fourth, it can prove that the circle ADP, AB and QC have a common point. Here you can still choose to prove that triangles are similar, or use Ptolemy's theorem, or it is not complicated to calculate the AF expression directly by brute force. ”

Writing this, although his words are getting smaller and denser, there is no space on the blackboard at all, so Su Chengyi no longer writes the steps, but just dictates.

"5. Prove that JBCQ is a parallelogram."

As he spoke, he changed the color of the chalk and added another stroke to the already messy picture.

"Sixth, prove the total circle."

"Seventh, introduce the point U, use the power of the circle..."

If at the beginning there were people who opened their notebooks to take notes or discussed each other, by now the classroom has been so quiet that there is no sound at all.

Everyone clearly recognized the difference between themselves and the guy on the podium, and maybe in some way they were not a species at all?

Zou Yong's back molars were about to crush.

Obviously, Su Chengyi was slapping him in the face.

The point is that as the other party listed so many methods in a hurry, his face began to turn red and hot as if he had really been slapped a few times.

Su Chengyi saw the reason why Chu Tianmian started the question from scratch, so he suddenly came on stage when he was not ready to go on stage at the beginning, and wrote so many damn solutions to mock himself.

Damn, damn it.

Even the easiest method written by Zou Yong, Han Bing finally understood it, let alone Su Chengyi wrote such a large number of heavenly books.

Although she had known for a long time that Su Chengyi was not a mortal, she was still completely shocked like her other classmates.

There is a sense that the worldview has collapsed and been reshaped.

Chu Qianmian had already retreated to the edge of the podium, and she could see it even more clearly with a VIP viewing position.

Su Chengyi obviously didn't have any preparations before he came to the stage, he just looked at the picture and said whatever he thought.

The point is that every line of thought he comes up with is completely correct.

It's really aggrieved to learn college entrance examination mathematics here...

It was far more than these classmates who were shocked, Li Lu was also so shocked that she was a little speechless.

Not to mention whether she thought of it herself, even the reference answer in her hand did not say those methods.

Probably said almost all the ideas he could think of, Su Chengyi patted the chalk ash on his hand and walked back to his seat.

It wasn't until he had all sat down to take a sip of water that the classroom erupted in thunderous applause.

"Oh my God, can you be any stronger?"

"How can I be in the same class as this kind of immortal!"

"It's not like a high school student can do it... It is recommended to send it directly to the Institute of Mathematics. ”

"I can't memorize so much according to the reference answer."

Li Lu raised her mobile phone and took a picture of the words on the blackboard, smiling happily, the gloomy face when she first started class had long disappeared without a trace.

"Students, it can be seen that our classmate Su Chengyi is very open-minded.

In this regard, the teacher would like to say that the charm of mathematics lies in its infinite exploratory nature.

I hope that his outstanding performance in this class can make the students in our class love mathematics more than the requirements of exam-oriented education! ”