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

Xu Heng, "Not necessarily, there is still a way."

There is a way?

???

Yue Pingting leaned into Xu Heng's arms, pouted, "What can I do? Tell me quickly."

Xu Heng smiled, "Look at your performance."

Yue Pingting, "!!!"

"Please, please tell me... please..."

Soft and hard foam.

Xu Heng finally said, "The young man knelt there, and the archmage asked why he came to become a monk. The young man could answer this way because he was inspired by the archmage."

Yue Pingting was stunned for a moment!

Don't say it!

This is really a trick!

Xu Heng, "If you were an archmage, even if you wanted to fight, would you be able to fight?"

Yue Pingting shook her head with a smile, "I can't continue."

Xu Heng, "That's right! If you can't keep fighting, you win!"

"!!!"

It really is!

Yue Pingting's eyes lit up, and she was ecstatic, "Honey, you are so amazing! Your IQ is so high! My God! Why didn't I find out earlier!"

Xu Heng rolled his eyes, "..."

"Stop flattering! Go to sleep..."

Turn off the lights!

But Yue Pingting was not sleepy, she kept talking to Xu Heng about this and that.

"Husband, why do the bosses of some big companies like to spend so much money on famous paintings? Do you really like it?"

"Or is it about the circle? In his circle, other bosses bought it, so he also bought it?"

Xu Heng, "You mean a listed company, right?"

"right……"

Xu Heng smiled, "It's not as simple as you think. Buying famous paintings is said to be because depreciation can offset wage profits."

"Buy a painting for 5000 million, and share 1000 million a year for five years, which will allow the company to pay less tax for five consecutive years..."

"Then, in the sixth year, when the depreciation of this painting has been amortized, the residual value of the book is 0. The big boss only needs to spend one yuan to buy the painting from the listed company, and the listed company has an extra yuan on the books. profit."

"The 5000 million paintings belong to the boss."

"Can you understand?"

Yue Pingting frowned, "No... I understand..."

Xu Heng smiled, "If you don't understand, then think about it."

As soon as I thought about it, I fell asleep.

A night without dreams.

When Xu Heng got up, Xu Zongyun also got up.

He's still quite disciplined.

After a whole day yesterday and the mutual help of everyone in the group, this set of test papers was finally done!

And Xu Zongyun also completely digested the content on the test paper.

"Brother! Give me another set of test papers!"

Xu Heng, "Are you sure?"

Xu Zongyun, "Are you sure?"

Xu Heng, "You won't give up the exam?"

Xu Zongyun immediately shook his head, "No, no, no! Absolutely not!"

Xu Heng, "Go to the study and get me a pen and paper."

Xu Zongyun hurriedly ran to get a pen and paper.

Xu Heng came right away.

It is known that the sequence {an} has 3n (n∈N*) items in total, record f(n)=a1+a2+…+a3n.

For any k∈N*, 1≤k≤3n, there are ak∈{0,1}, and for a given positive integer P (P≥2), f(n) is an integer multiple of P.

Denote the number of sequence {an} satisfying the above conditions as Tn.

当P=2时，求T2的值；当P=3时，求证Tn=1/3[8（n次方）+2（-1）（N次方）]。

"Just this question, go to the study and do it!"

Xu Zongyun was sent away immediately.

Xu Heng washed himself and went downstairs to have breakfast.

He didn't know what time Xu Yueshan and the others went to bed, but they got up as usual, and Zhou Xiu'e made breakfast.

Seeing Xu Heng, "Xiao Yuezi, are you still sleeping?"

Xu Heng, "Yeah."

Zhou Xiu'e, "Then eat well, bring some up to Xiao Yuezi, and tell her to sleep after eating."

Xu Heng, "Mom! No way!"

Xu Heng swiped his phone while eating breakfast.

In the group, a picture of a top-bottom comparison is being discussed.

The previous picture is: Panda people are playing games, saying: If you win, you will sleep.Beside the window, is the moon and stars, the time is 1:15.

The next picture is: Pandaren are playing a game, saying: I won, it's very simple.Next to the window, there is the same moon and stars, but the time is 1:00.

Many people in the group participated in the discussion.

This gave Xu Heng a feeling of deja vu.

"I always feel like this is a bunch of idiots..."

But in the group, it was full of enthusiasm.

"I think it must be the next day! We fought all day and all night!"

"Impossible! If it's a day and a night, why are the moon and the stars exactly the same?"

"If you are entangled in this, it is obviously unreasonable!"

indeed!

These two pictures seem unremarkable, and normal people will definitely think that he has only played for one day.

If you observe carefully, you will find that the moon outside the window is in the same position.

Some people in the group also noticed this, so they insisted that it couldn't be that simple.

"It takes at least one month for the moon to be in the same position at two points in time! This does not include leap years, or cloudy conditions!"

The people in the group gradually divided into two or three viewpoints.

Some say it's a day!

Some said it was a month!

Some just give up!

At this time, Xu Heng suddenly said, "Didn't you notice that the position of the stars has changed?"

Everyone, "!!!"

"Master Xu Heng! Don't talk!"

"I have a bad feeling..."

"hiss!"

"@许健大大, please enlighten me!"

In the early morning, people who were still a little sleepy, at this moment, suddenly no longer sleepy.

The corners of their eyes twitched.

My heart hangs!

"Well, ahem, Mr. Xu Heng, history won't repeat itself, will it?"

The group leader and the others remember clearly that Xu Heng's words were not amazing and endless.

"Haven't you ever been exposed to rain?"

What a shame!

"Master Xu Heng, please take your time!"

"Save some face!"

The group leader begged grandpa to sue grandma.

Xu Heng, "Uh..."

"It's like this. From the picture, we can see that the position of the stars has changed, but the position of the moon has not changed, which means that a Saros cycle has gone through."

Saros cycle?

Everyone, "???"

"Wait! Mr. Xu Heng, what is a Saros cycle?"

Everyone in the group was stunned.

Among the students of Tsinghua University and Peking University, some people sent a message in doubt, "Saros cycle, an astronomical term, refers to the cycle of solar and lunar eclipses. It refers to a period of time with a length of 6,585.32 days. The relative positions of the sun and the moon will be basically the same as before, so the solar and lunar eclipses in the previous cycle will reappear one after another."

"Is this what Xu Heng said?"

Xu Heng, "Yes!"

"After one Saros cycle, the three are in approximate relative positions."

"Therefore, before and after a solar or lunar eclipse, at intervals of the Saros cycle, there will usually be many solar and lunar eclipses with similar characteristics."

"The seniors above also said that the duration of a Saros cycle in 043 is 6 days, which is more than 585.32 days in 18 years, so this pandaren played for more than 11 years and 18 days before he won such a game."

Everyone, "!!!"

The answer Xu Heng gave was 18 years!

This is something no one has ever imagined.

"18 years, it's ridiculous!"

"I always feel that Xu Heng is talking nonsense! But I can't find a reason to refute!"

"Damn it! How can it be repaired!"

"..."

Xu Heng smiled and was just about to put down his phone when someone @him.

"@许健大大! Let me ask you a question! For a cube with six different faces, how many kinds of expansion diagrams are there?"

Xu Heng didn't even think about it, "."

Lightning answered!

"Can you ask something nutritious! Everyone? Discussing a few Olympiad problems is also fine!"

too easy!