Xueba, I beg you to go and escort him quickly!

Xu Zongyun, "Yeah!"

During lunch, Xu Zongyun specifically mentioned this matter at the dinner table.

"Uncle, Auntie, Dad, Mom, I have a friend who will come to my house in the afternoon, can I?"

Xu Yueshan, Zhou Xiu'e, Xu Yuehai, and Wei Xiaojiao were all stunned for a moment.

Xu Yuehai, "Why don't we know that you have friends here?"

Xu Zongyun, "We met in my brother's fan group! Are we...face-based?"

Wei Xiaojiao was curious, "Male or female?"

Xu Zongyun, "Men!"

man...

call……

Wei Xiaojiao breathed a sigh of relief, and so did Xu Yuehai.

But next second...

Geek! ! !

What the hell!

Holy shit! !

What the hell! ! !

male?

brush!

For a moment, Xu Yuehai and Wei Xiaojiao glared at Xu Zongyuan, "!!!"

Xu Zongyun thumped in fright, "Parents, why are you looking at me with such terrifying eyes?!"

Xu Heng saw through it at a glance, "Is your orientation okay?"

Xu Zongyun, "???"

"What? Brother, why are you asking that suddenly... Wait a minute!"

"You, you! Parents, what do you mean?! Hey, hey, they are really just ordinary friends! You think too much!"

"My God! It's not what you think! I like girls!"

Wei Xiaojiao disagreed, "I like girls, what, you have a girl you like? Good! You! Xu Zongyun, let me tell you...!"

Xu Zongyun pouted immediately, "Don't, don't! Stop! Mom! It's really not what you think!"

"I don't have a girl I like now, I just tell you that I have a normal orientation!"

"Besides, he is my brother's fan, passing by, just in time to have fun!"

Xu Zongyun was spared by moving Xu Heng out.

Xu Heng, "???"

Xu Zongyun, "It's in the group, but there are millions of people in the group, brother, you should not know it!"

"It's just that I often discuss topics with him."

Xu Heng didn't ask any more questions.

When Luo Dachuan appeared at the door of Xu Heng's house.

Wearing myopia glasses, he looks very gentle, but no matter how you look at it, he is almost 30 years old.

Xu Zongyun looked at Luo Dachuan!

Luo Dachuan looked at Xu Zongyun!

The corners of Xu Zongyun's eyes twitched, "Uh... I didn't expect you to be so old! Are you a graduate student now?"

Luo Dachuan smiled, "No, I'm working, I'm just interested in mathematics!"

Fine……

After all, everyone is here, they are guests.

Xu Yueshan, Xu Yuehai and the others naturally greeted each other with smiles.

Luo Dachuan, "Great decoration! Isn't Mr. Xu Heng here?"

Xu Zongyun, "My brother and sister-in-law are taking a nap!"

Brother...and sister-in-law?

That is Xu Heng's wife!

Luo Dachuan was speechless, his face turned green.

"This, this, this, is Xu Heng married?"

"???"

"Isn't he just a high school student? Not yet of legal age for marriage?"

Zhou Xiu'e laughed, "What effect does that have! You are not married because you are not yet old!"

Luo Dachuan, "That means girlfriend..."

In this way, he can be slightly relieved...

and many more!

Let go of the wool!

!!!

High school students!

High school students in love!

Didn't your parents stop it?

Why do you look calm and even very relieved.

Luo Dachuan was a little dumbfounded, "???"

I think he is now almost 30, and he is still a single dog!

This injury is not ordinary!

It's a full crit!

Instant kill!

He felt that his whole body was not good.

Xu Zongyun, "So, when he wakes up, it's still early, let's go see the astronomical telescope?"

Luo Dachuan, "Good!"

Xu Zongyun, "But... I need my brother to adjust this thing, ordinary people don't understand it!"

Luo Dachuan had black lines on his face, "%%####%￥..."

Xu Zongyun was excited, "Anyway, idleness is idleness, why don't we do a set of test papers first!"

"I found a good set of test papers! It's the one that the group said is more difficult!"

"Ahem! Of course, compared to my brother's test paper, it's much easier, but compared to other test papers, it's still quite difficult!"

Luo Dachuan opened and closed his mouth, I'm here to discuss business!

I'm waiting for Xu Heng here, swiping my phone, that's fine!

But you just let me do the questions?

Xu Zongyun, I'm afraid you're not out of your wits, are you?

Are you a fool?

Xu Zongyun, "Look at the news in the group!"

"Everyone is discussing this set of test papers!"

Luo Dachuan took out his mobile phone and checked it.

Everyone really started discussing in the group.

"Have you heard about it? This set of test papers seems to be a relatively difficult test paper. Anyway, the students who have done this set of test papers have a headache."

"What are you talking about, this set of questions is comparable to the college entrance examination!"

"This math test paper has been added to the college entrance examination!"

"It's just a math test paper, what evil can it have? He just doesn't want people to pass!"

"My mother! Is it really that scary?"

"This is not an ordinary final exam paper! This is obviously the Qingbei self-enrollment exam paper?!"

Everyone, "%￥###￥..."

Students who have done it have already complained.

"I really want to ask the students who take this test paper, are they doing Qingbei self-enrollment test papers every day?"

"???"

Many students are eager to try, "It's so difficult, come on, everyone, let's do it!"

"Quick, quick, go and try!"

"I still don't believe it, it's even more difficult for someone to come up with a question than Xu Hengda!"

Looking at the commotion in the group, Luo Dachuan frowned slightly...

No matter how curious and interested he is, his mind is not on math problems at all. The main purpose of his trip is to meet Xu Heng, and to discuss cooperation!

Hey……

But Xu Zongyun had already brought a pen and paper.

"Quick! Stop the ink! Let's do it!"

Look at the question!

Luo Dachuan could only look at the questions helplessly.

There is only one idea in his mind now, and he can only find a breakthrough from this test paper.

If you encounter any questions you don't know, just ask Xu Heng directly!

"Hey……"

Sighing resentfully, he bit the bullet and started doing it.

Known proposition P: x ∈ R, (2-x) (1/2 power) < 0. Then, the proposition is not P...

……

Known hyperbolic...

……

Among the following functions, the AND function...

……

将函数f（x）=2sin（4x-（π/3））的图像像左侧平移π/6个单位，再把所有点的横坐标延长到原来的2倍……

……

It is known that the inner angle of △ABC, the opposite sides of A, B, and C are a, b, and c respectively, and (a2+b2+c2)*(acosB+bcosA)=abc, if a+b=2, then c What is the value range?

……

Do it one by one.

It is indeed very difficult.

Luo Dachuan couldn't help frowning.