The power of the Star Warlock mainly comes from three aspects. Talent, star array, plus all kinds of computing skills trained day after tomorrow.

Squared and square are the simplest calculations, and naturally it is difficult for the astrowizard to eat with this, but to use oral arithmetic to open a square of 1369 (the square value of 37), except for the familiarity and sensitivity to numbers, there are not many shortcuts.

In the eyes of the young sorcerers, a person who memorizes the square of 37 (Note 1) will obviously remember more simple calculations, and these are the basis for increasing computing power.

Even in the 21st century, those genius mental arithmetic boys also rely on memorization and memorization of many commonly used formulas and numerical operation results to show amazing computing ability.

By the standards of the 16th century, as a teenager of twelve or thirteen years old, Cheng Jinzhou's cousin was obviously expected by some gentlemen.

How did they know that Cheng Jinzhou judged the third digit entirely based on the Pythagorean number -- if he hadn't been reading "Geometry Originals" a lot in recent days, he would have been far less sensitive to these numbers than a mathematics student preparing for an exam.

In any case, Liu Kuang has a great impression of Cheng Jinzhou, a young man who looks thin and weak, and he also has the "style" of a star warlock, and he is also very "hard-working", and he said in a softer voice: "The solution is very fast, that calculation bag is indeed a gift that should be given to you." ”

It was confirmed that Cheng Jinzhou was not lucky, and the gift was naturally to be given.

Cheng's mother's face suddenly glowed.

I heard Liu Kuang continue: "Then I'll ask you again." ”

As he spoke, Liu Kuang swiped lightly, instantly drew a standard parabola on the paper a few meters away, and asked, "Have you ever seen this figure?" ”

Cheng Jinzhou was still admiring the star warlock's miraculous skills, and he was suddenly in a dilemma. In the era of the popularization of mathematics, anyone who drew a big inverted U shape, people's first reaction was a parabola, not the letter U that was hit by a Mitsubishi modified car, but in this era, it is really difficult to say that you know the parabola.

After a moment, Cheng Jinzhou hesitated and said, "I've seen it." ”

"It seems that you have read a lot of books yourself, and the children of the family are different after all." Liu Kuang's words were flat, but the appreciation in his tone was audible to everyone.

The Cheng family does have a good library, but there is really not much content about mathematics and physics.

"We call it a parabola, on both sides of it, draw the coordinate axis, for (o,o)......" Liu Kuang then went on to talk about the coordinate system, in front of everyone, the degree is very fast, but the content is very simple.

For this world, the concept of coordinate system is already one of the cutting-edge. Knowing how to use coordinate systems means that analytic geometry begins to expand, and in many cases, analytic geometry can solve many problems that ordinary geometry cannot solve, of course, its most important thing is that it can be integrated with algebra to solve geometric problems quantitatively - in practical applications, determining numerical values is often more important than qualitative.

Perhaps it was the need of the Star Warlocks, and in this regard, their exhibition was far more than Cheng Jinzhou estimated. It seems that a very low-level astral warlock apprentice has a considerable knowledge of coordinates.

Liu Kuang spoke for three or four minutes, and then asked Cheng Jinzhou: "In this case, can you find out what is the focus of this line that crosses the vertex coordinates and the parabola?" ”

It is a very rudimentary question, but it still involves some equation problems, and in the world where Cheng Jinzhou is located, it is a binary equation, and it took hundreds of years to get the answer.

Several Star Warlock disciples also stared at Cheng Jinzhou, people who had just come into contact with the coordinate system, facing similar problems, must be in the clouds, just like Cheng Jinzhou's fathers in his previous life, although they received the basic education of the Cheng family, they couldn't understand the problem of coordinates at all.

Cheng Jinzhou had a condescending and anti-discrimination pleasure, pretending to be pretending, weakly clicking on the paper, and casually calculated: "25, 25." ”

When I read it, I realized that the old man swiped it casually, but it was quite accurate.

Everyone in the Cheng family looked at each other in surprise, and the sick child Cheng in their impression seemed to be too different from the child in front of them. Of course, people don't associate it with an impractical crossing.

Liu Kuang continued to ask questions noncommittally, and soon simple functions were involved, but it was obvious that these were a bit too pediatric for Cheng Jinzhou.

Elementary mathematics, for doctoral students in the 21st century, must be thoroughly studied. Since going to college, Cheng Jinzhou has rarely been so confident.

At the beginning of the period, Cheng Jinzhou was a little too excited, and he didn't know much about the mathematics exhibition of the Great Xia Dynasty, so he said a few surprising words, but fortunately, there were not too many normal categories - or, by the standards of astral warlocks, the scope of normal people was broad enough.

Time passed quickly, and there was a meal in the middle, and when night fell, the Cheng family once again warmly invited Liu Kuang to dinner, but the latter finally refused.

Moreover, in Cheng Jinzhou's expectant eyes, Liu Kuang did not put forward any more valuable requests for apprenticeship. Although he was very satisfied with Cheng Jinzhou himself, he also said a lot of praise.

While scratching his head, Cheng Jinzhou had to admit that he still failed to try to repeat the road to success through the crowd.

Even Cheng's mother couldn't hide her disappointment, and said vigorously: "It's okay, you're still young." ”

In fact, for children who want to become star warlocks, 12 years old is not too young. There are always many factors to consider when an official star warlock accepts apprentices, and luck is one of them, after all, they don't recruit apprentices all year round.

A group of people waited, and they had dinner in the main house with different moods, and each went back to their rooms.

The red and yellow lanterns shone on the bluestone road in fog, and Cheng's father walked on the left side of Cheng Jinzhou with his hands behind his back and pacing. It's a lot closer than the usual style.

He was also more pleased than surprised by Cheng Jinzhou's appearance throughout the afternoon, and after a moment of silence, he said: "My father doesn't know that you like the study of mathematics and physics, this is also a road, if you like it, you can ask a few colleagues to send you to Xiangcheng or the capital." ”

Xiangcheng is a top big city in the entire south.

Cheng Jinzhou was quite moved, but quickly shook his head and said: "My parents are not far away, if I want to go, let's see." ”

His mathematics has little to do with this era, and even the best school is meaningless.

Maybe the first sentence was used well, but Cheng's father didn't care about Cheng Jinzhou's lazy tone, nodded slightly and said: "Every three days in the future, come to my room to test your homework once, remember." ”

Cheng Jinzhou's face suddenly became bitter as if he had been beaten, and he strongly objected: "You are usually busy with official business......

"That's it." Cheng's father took out the demeanor of the head of the family.

Cheng Jinzhou was helpless, seeing that his mother didn't seem to be able to object, he retreated and said: "I want to do some experiments, I need to get some food." ”

"Mathematics and physics are also on the right path, and the rest is still less mixed." Father Cheng said, changed his words, and said, "Don't waste it, be specific, tell your mother." ”

Like the scholars and literati of ancient China, Cheng's father had a weak concept of money itself as long as he lived a worry-free life.

Speaking of the matter of the inner house, Cheng's mother sighed slightly: "In the middle of each month in the future, let the Zhuangzi outside the city send an extra 5o stone of grain over, what do you want, just tell the housekeeper in advance." ”

"Okay." After a busy day, getting such an answer, Cheng Jinzhou can't say whether to be disappointed or satisfied.

Note 1: 37 is a prime number, and the square and cubic values of prime numbers are usually memorized.

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