Goku, it's up to you

Chapter 1 Spiritual Revolution
"Chen Xuan, can you guide me?"

The girl at the same table handed over a pen and paper for help.

"Huh? Oh, yes."

Chen Xuan recovered from his daze, subconsciously took the paper and read it:
[A 'violent monkey' moves around in the forest using the racial skill 'Vigorous Follow'.The speed at which it moves from one tree to another is V(t)= 3t^2 + 2t + 1; if the violent monkey is in tree B at t = 2 seconds, when t = 5 seconds, the violent How far is the monkey from the B-tree? 】

Violent Monkey?What the hell topic?

Chen Xuan raised his eyebrows, resisted the heart of complaining, and explained in detail:

"This question does not need to be derived, but integral. The displacement is equal to the integral of the velocity. Therefore, we can integrate the velocity function V(t) once."

"After the integration, there will be a constant C. In order to determine the constant C, we need to use the initial conditions: the violent monkey is in the B tree at t=2 seconds. Substitute it and you can find the value of the constant C."

"Finally, substitute t=5 into d(t)=s(t)s(2) to get the displacement within [2, 5] seconds."

After the explanation, Chen Xuan looked at the clear and stupid eyes of his deskmate, wondering if he had explained enough in a simple way.

"So this is ah."

The girl at the same table nodded half-understood, but hesitated for a moment, and then weakly questioned: "The racial skill 'Vigorous Follow' in the question is just for the questioner to confuse. ?”

"Um"

Hearing what she said, Chen Xuan couldn't help but frowned, realizing that the question was not simple.

Because 'Violent Monkey' is a creature with extraordinary power called 'Yu Ling' in the most popular board game "Yu Ling Lu".

According to the description on the card, when 'Violent Monkey' activates the racial skill 'Vigorous Follow', each action will increase the comprehensive ability by 10%.

Considering that board games are turn-based, if this improvement is put into reality, it should be continuous and accumulate over time.

Corresponding to the context in the title, it can be understood as an increase of 10% per second.

"Sorry, I missed this condition. The formula should be changed to V(t)=(3t^2 + 2t + 1) multiplied by 1.1 to the power of t, and then the integral operation is performed."

Chen Xuan, who corrected the mistake, couldn't help but praised, "This set of titles is pretty good, where did you buy it? I've been playing "Yu Ling Lu" for so long, and I didn't even know it was co-titled with "Five Three" gone."

The girl at the same table blinked, stared at Chen Xuan for a long time, and then said with a strange face: "What are you talking about? You didn't report to the imperial department, where did you get the imperial talisman?"

"what?"

Chen Xuan was taken aback.

Isn't it possible to buy a pack of Yulinglu for five yuan at the canteen?

Could it be that his poverty-stricken temperament has developed to such an extent that he can't hide it with just a handsome face?
[Students from the first year of high school have already entered the arena in an orderly manner, and the "Initiation Ceremony" is about to begin. If some students from the second year of high school still intend to report to the "Yu Ke", they can also go to the playground to wait in line. 】

Just then, the radio rang.

The radio rang three times in a row, and Chen Xuan listened carefully three times, but he still didn't understand what event was being held.

"Forget it, anyway, only the first and second year of high school were named, it shouldn't matter to me as a third year of high school, let's hurry up and review."

Chen Xuan didn't pay much attention to it, and reached out from the drawer to pull out a tutorial book that just arrived yesterday - "Summary of High Frequency Test Sites in History".

The first few pages of the book are the major events of each era sorted out according to the time axis.

Whether it was the disintegration of slavery in the Spring and Autumn Period or the sprouting of capitalism in the Renaissance, they were all exactly as they were in memory.

but.
The historical events from modern times onwards were directly shown to Chen Xuan as silly:
[In the middle of the 18th century, the first well-documented supernatural creature appeared in the list of royal tributes of the British Empire—an owl that could spit frost.

The eldest princess, who was still young at that time, would personally feed the owl locked in a huge cage for viewing every day.

Until one evening a month later, an accident happened.

When the princess went to feed it as usual, this lazy fat bird, who usually kept its eyes half-closed, suddenly launched an attack.

A sharp ice pick thrown out by Zing Yi nailed to death a colorful poisonous snake trailing behind the princess!
After this incident, a series of royal infighting was also involved.
In short, in order to commend its loyalty and bravery, the then queen named it 'Hedwig', which means 'guardian beast sent by the gods', and awarded it the thistle badge, one of the highest honors of the Royal Knights.

Later, the name 'Hedwig' was also used to collectively refer to those extraordinary creatures that emerged one after another, and the Chinese translation was 'demon spirit'.

Some mild-tempered demon spirits can participate in production after simple domestication, and their efficiency is far better than that of ordinary livestock, which promotes rapid economic growth.This period is known as the 'First Yuling Revolution'. 】

[By the middle of the 19th century, breakthroughs were made in the "rune literature" derived from the study of demon spirits and ancient totems, and a very small number of people could make demon spirits more obedient through the form of "contracts".

The two who reached the contract are called 'Yu Shi' and 'Yu Ling'.

As a result, the demon spirit has a legally special status, and begins to transform from simple labor to complex labor.

The further refined use of supernatural powers such as wind, fire, thunder and lightning promoted the development of a series of related technologies such as steam and electricity, and the economy of the European continent began to take off. This period is called the "Second Spiritual Revolution". 】

[In the middle of the 20th century, all the countries participating in the Second World War were eager for the imperial envoys and imperial spirits to exert more powerful power on the battlefield.

Therefore, the "Enlightenment Instrument" came into being, so that the contracted demon spirits are no longer the monopoly of a very small number of people, the number of "envoys" has exploded, and the battle situation has become more and more tragic.

In addition to the continuous improvement of the spiritual enlightenment instrument and the increase in quantity, scholars from various countries are also deeply cultivating another research direction-improving the quality of imperial envoys.

Originally, there were only 6 levels corresponding to military ranks regarding the division of the abilities of imperial envoys and imperial spirits:
Civilian, soldier, soldier, lieutenant, school, general.

Thanks to the huge amount of manpower and material resources invested in World War II regardless of the cost, the assertion that "the general level is the limit" was shattered, and further promotion paths were gradually explored. Finally, the seventh level was officially born - Wang.

That is unprecedented powerful force!
At that time, Dongying, who had personally experienced two attacks by king-level imperial spirits, could be said to have the most say in this matter-the question of thinking directly changed from 'whether to surrender' to 'how to surrender'.

As the study of demon spirits has accelerated, the changes of the times have also intensified. This period is called the 'third revolution of spirit control'. 】

　(～￣▽￣)～seeking collection~seeking investment~seeking ticket~
　　
　
(End of this chapter)