Xueba: I missed one exam, and I won the first place in the school

There are two minutes left, that’s enough

“ten minutes!”

“This math test paper, ten minutes??”

“Just kidding!”

“That’s right, how is it possible!”

“It took me half an hour to do the multiple-choice questions!”

Everyone couldn’t believe it.

Even Wang Chengyuan on the podium, his eyes widened at this moment!

The test papers in this test are all very difficult, especially math!

The examination team even greeted in advance, so don’t be surprised to see the ultra-low score, it’s normal!

It was this test paper, Jiang Feng spent ten minutes? Got a perfect score? ?

Even their math teachers wouldn’t have such efficiency!

Where is Jiang Feng’s bottom!

So strong that people can’t see through it!

“You…could you have read it wrong?”

He asked luckily, his tone even weaker.

With her chest straightened out, Wei Xiaolu replied firmly, “I’m not a handicapped person, how could I get it wrong.”

She vividly remembered the scene in the examination room!

Turning her head to look at Jiang Feng, her heartbeat actually accelerated a bit.

Didn’t you say that no one is perfect?

Why can she be so handsome and have such good grades!

Jiang Feng scratched his head.

To be honest, if you study hard and do more questions, the difficulty of this test paper will be the same.

Why did you make such a big fuss?

Wang Chengyuan looked at the last row again.

After one class, this movement has become a habit!

“Jiang Feng, did you really only do it for ten minutes?”

Even with Wei Xiaolu’s affirmation, he still couldn’t believe it.

“Yes, teacher, they are all common questions.”

Jiang Feng shrugged and said.

Section 8

“Hiss!”

The students took another breath of air.

Usual topic, meaning we can’t reach the level of “ordinary” yet?

Then what are we? ?

Wang Chengyuan couldn’t believe it even if he was beaten to death, but Jiang Feng could say this from Jiang Feng’s mouth.

It’s not easy to refute!

Full marks, well-founded!

He swallowed a mouthful of saliva, “Do you really think these topics are common?”

“yes.”

“Sit down…please sit down.”

He said tremblingly.

The one standing in front of him now is the baby of Class 16!

Don’t mess with it!

Hearing such a tone, the students couldn’t laugh or cry.

Lao Wang, Lao Wang, haven’t you just finished your transformation?

He was staring at Jiang Feng just now, so vicious?

Now the hair has been smoothed out again?

Wang Chengyuan put down the report card in his hand, “Then let’s talk about the topic now.”

Chen Ting raised her hand, “Teacher, you only reported Jiang Feng’s grades.”

“Really?”

Wang Chengyuan pointed to the bulletin board on the side of the blackboard, “I’ll clip the list here later, and everyone can come and see for themselves.”

He originally wanted to study, but after seeing the results of the second place Yao Guangzhi and the school’s ranking, he felt that it was unnecessary.

With such a big disparity, the report will hurt the hearts of the students, right?

Everyone: “……”

So, we are not important anymore.

With Jiang Feng, we are all decorations!

That’s right, the Chinese is absent, and the other subjects are full marks. Under such light, where can I see them?Firefly!

Song Bo turned his head, feeling mixed feelings in his heart.

“Feng, you…how can I get along in class in the future?”

It was agreed to take turns, and I will become a nail household in the future!

Jiang Feng patted him on the shoulder, “Don’t worry, brother, those who sit at the same table with brother are not ordinary people, you can accomplish great things.”

“…”

Wang Chengyuan spread out the test paper.

Although he knew it was difficult, he didn’t look ahead.

After all, for a competent teacher, no matter how difficult the topic is, it is easy to reach out.

“Let’s look at the first question.”

“This question examines the comprehensive application of sets and equations.”

“To make the set A an empty set, this equation needs to have a solution…”

“It still has to be a solution less than 0.”

He frowned slightly and narrowed his eyes slightly.

This test set, the first question is a detour.

Too hard.

He picked up the chalk and wrote on the blackboard, explaining while writing: “But it’s not difficult, just do it normally.”

“The last 0 is less than or equal to p is less than or equal to 1.”

“If you’re right, raise your hand and let me see.”

There were less than twenty people who raised their hands in the audience, and most of them lowered their heads.

“How many times have I told you, you have to read the topic carefully, and do it after you see it clearly.”

He shook the test paper and looked at the next question.

Although the first few questions are roundabout, they are all normal questions, not confusing, and can be accepted.

The last question of the multiple choice question.

“The known function f(x) is equal to the root sign minus 3 minus ax and the plus a minus 1, (a is not equal to 1), if f(x) is a subtractive function on the interval (0, 1], then the real number a takes What is the value range.”

“Hiss…”

He breathed a sigh of relief.

He does know how to do it, but it’s too harsh for a first-year high school student to do this topic.

It’s a completely super-class topic.

He said, “Everyone, try to listen to this topic. It doesn’t matter if you don’t understand it.”

A warm current flowed from the hearts of the students.

Lao Wang, you also know that we have been abused!

It’s not human who came up with this topic!

After writing the topic on the blackboard, Wang Chengyuan turned his head and took a peek at Jiang Feng.

For a question of this intensity, it only took this guy ten minutes to complete the complete set of test papers…

too exaggerated!

His eyes gradually showed admiration.

Jiang Feng was a little confused.

The head teacher’s words have misled the students, right?

As far as this topic is concerned, if you arrange it in order of difficulty, you have to count as far as you can tell.

So “it doesn’t matter if you don’t understand”?

Or is it that my mathematics level has reached such a level?

Not so, not so…

“This topic must first be discussed in categories.”

“There are two cases where a minus 1 is greater than 0 or less than 0.”

“In the first case, a minus 1 is greater than 0, and a is greater than 1. At this time, we need 3 minus a to be greater than 0, and then we get that 1 is less than a and less than 3.”

“In the second case, a minus 1 is less than 0, and a is less than 1. In this case, -a must be greater than 0, so the range is from negative infinity to 0.”

“The last two sets are merged.”

“Finish.”

“As long as the organization is clear, the answer is easy to come by.”

He breathed a sigh of relief and put down the chalk.

Chu Ran: “…”

Are you doing gods and demons?

Wang Chengyuan looked at the answer in his eyes, and suddenly his eyes froze.

Turn around and look at your answer.

No? ?

However, he quickly discovered the mistake and explained: “The 3 here can be obtained, but the 1 cannot be obtained.”

Quickly changed the parentheses into square brackets.

classmates:”…………”

You have to read the title carefully, Lao Wang!

If it hadn’t been for the fact that the top officials crushed people to death, they would also want to recount a few words in reverse!

Wang Chengyuan turned his wrist unconsciously.

This is the multiple-choice question. It’s so difficult. He’s under a lot of pressure for the next question!

It really should take time to do it in advance!

This damn reference answer actually only has answers on it!

If this makes a fool of myself in front of the students, it won’t be easy in the future!

There’s no way, I’ve already stood here, I have to hold on, and speak bravely.

The questions are getting more and more difficult, even so difficult that he has to spend time on the spot to think about it and try it!

Fortunately, I have a good sense of the topic, and I have found the right direction.

After finishing the penultimate question, there are only 3 minutes left.

He looked at the blackboard full of chalk and let out a long breath.

“That’s all for this lesson. I’ll talk about the last question in the next lesson. Let’s digest it.”

He read the last question twice, but he couldn’t find a clue!

To figure it out, it takes twenty minutes to talk at least!

Section 9

It takes half an hour to explain!

I really don’t know where the examination team found the questions.

He looked up at the last row again, thinking to himself: How did you do it, my good Jiang Feng?

Jiang Feng put his head on the desk, closed his eyes and meditated.

If the topic is too simple, it will make people sleepy.

Telling simple topics step by step makes it easier to hypnotize.

At this time, Yao Guangzhi, who had been silent all this time, raised his hand and said, “Teacher, let Jiang Feng talk about the last question.”

He doesn’t care if he suffers in the group, but the prototype of this question is a high school competition question!

Included in the materials he bought, five-star puzzles!

Does Jiang Feng really have the ability to do it?

still…… have clues?

He couldn’t accept this contrast.

Wang Chengyuan: “I don’t have time for this class, what else to talk about, let’s talk about it in the next class.”

Three minutes is not enough to talk about one fill-in-the-blank question, let alone the last big one.

It’s not pure nonsense.

Yao Guangzhi: “Teacher, I just want to rule out Jiang Feng’s suspicion of cheating.”

He summoned up his courage and said.

If he didn’t speak out, he couldn’t convince himself.

The students all breathed a sigh of relief.

That’s right, such an outrageous score, it’s hard to believe that it wasn’t cheating!

But… this way of cheating is a bit too unintelligent.

Even if you copy homework, you have to deliberately write a few differences.

Wang Chengyuan frowned, “We are a group, we must trust each other! Instead of being suspicious of each other!”

“Everyone be quiet, we’ll talk about it in the next class.”

At this time, a steady voice sounded.

“Teacher, since everyone is so eager to learn, I can talk about this topic.”

Jiang Feng raised his hand and stood up.

It has to be said that what Lao Wang said just now moved him a little.

Made him sit still.

Wang Chengyuan’s face turned into a gentle expression, “But time is really not enough…”

“There are still two minutes, that’s enough.”

Everyone: “!!!”

They thought there were two endings.

One is that Jiang Feng directly exposed his flaws, and the other is that he dragged the hall to complete the explanation!

And never expected that Jiang Feng would say that!

Two minutes… Enough!

Two minutes!

The recommended solution time for this question is 30 minutes!

And it’s still for those who are the masters of the competition!

Yao Guangzhi was so frightened that his legs couldn’t stop shaking!

His face has already started to hurt!

Wang Chengyuan stammered and said, “Come on, come on, let’s talk about this last question…”

As he spoke, he picked up the blackboard eraser, wiped a blackboard clean, then tremblingly picked up a piece of chalk, and handed it to the corridor.

Jiang Feng walked to the podium unhurriedly.

The most handsome scenery in the classroom!

Chen Ting, Wei Xiaolu and other girls couldn’t help but make secret promises!

Song Bo secretly said: “In the end, I alone bear everything.”

Jiang Feng took the chalk and explained while writing on the blackboard.

“The first question, to find the answer, you must first prove the increase and decrease of f(x) in the domain of definition.”

“To prove the increase and decrease, you must first figure out its domain of definition.”

“The title only says that beta is greater than alpha and greater than 0, but there is a hidden condition. If alpha is less than or equal to 3, then the function is meaningless, so it can be concluded that beta is greater than alpha and greater than 3.”

“In this way, the whole thing is clean. Directly specify two parameters x1, x2, and bring them into subtraction to see the positive and negative.”

“Because there is a logarithm, so just look at the comparison with 1 later, it’s much simpler.”

“Here is a trick. You can first subtract to see the size, and then compare the values.”

“Then, it’s a simple discussion by category.”

“Finally, the stem of the question says it’s an opposite number, so the answer is 8, don’t write it as -2 foolishly.”

Yao Guangzhi: “…”

Everyone laughed secretly in their hearts.

You, Yao Zi, have today too!

Don’t be so stupid in the future.

“The second sub-problem directly uses the conclusion of the first sub-problem, and it is fixed that 0 is less than m and less than 1.”

“So just bring it in and let the equation find a solution.”

“There is also a skill here. The factorization and combination are made into three brackets, which can be seen at a glance.”

“It’s easy to make a mistake if you count death.”

“The minimum value of m calculated here is b squared minus a.”

After speaking, Jiang Feng put away the chalk.

The neat chalk writing didn’t take up much space, but it was well organized and the steps were clear!

Done in one go!

“Jingle Bell……”

With the return of the chalk, the bell for the end of get out of class just rang.

Two minutes, just right.

The audience was silent.

………