My Senpai Knows Magic

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Chen Luo looked at the girl blocking the way, squeezed a blunt smile on his face, and said, "Senior Isabella, what a coincidence..."

Isabella looked at him, with a bit of resentment on her face, and even more dissatisfaction, she gritted her teeth and said, "Unexpectedly, you are the Blair that Mrs. Britney said..."

She had wanted to know the second-grader who was gifted in mathematics that Mrs. Britney had mentioned for a long time.

Of course, at that time, she had comparative thoughts in her mind, but for several days in a row, every time she went to his classroom, he "coincidentally" wasn't there, once or twice was a coincidence, and ten times, it must be him Dodging on purpose.

After Isabella investigated, she found out that the Blair that Mrs. Britney mentioned was the rude guy who bumped into him twice that day, and the famous magic waste of Saint Donus College.

Of course, not anymore.

A few days ago, after the incident in the magic practice class got out, Blair was known as the fastest man in the entire second grade. In terms of the speed and stability of casting fireballs, even most third-grade students could not compare. he.

However, after knowing Blair's identity, Isabella didn't care whether he was a math genius or a magic genius.

This disrespectful person actually covered her mouth when he was reciting a magic spell, and interrupted a magician's spellcasting in this way---is this something people do?

For a lady, this is also an unforgivable humiliation.

Thinking of this, the anger that was finally extinguished in her chest was born again.

Chen Luo saw that Isabella's flat chest began to rise and fall, and was very worried that she would summon a fireball again. The appearance of a beautiful figure in the distance finally gave him hope.

"Teacher Britney!" Chen Luo greeted Teacher Britney from afar.

"It's Blair, I'm looking for you." Teacher Britney walked over quickly, with a smile on her face, and said, "I have something to tell you."

Seeing Teacher Britney, Isabella temporarily suppressed the anger in her chest.

Chen Luo has a good impression of Teacher Britney, not only because of Blair's relationship, Chen Luo also saw her dedication to mathematics.

Teacher Britney said embarrassingly: "About what you said, if a set of numbers starts from the second item, and the difference between each item and its previous item is equal to the same constant, then their sum can actually be used Described by the same simple formula, I have found this formula, and wrote a paper, which has just been selected by the journal, because the appearance of this paper was inspired by you, so this article is jointly signed by us .”

The reason for her embarrassment is that this article was inspired by Blair. Blair has obviously discovered this rule and will soon find out this formula. In doing so, she is suspected of stealing the research results of the students.

Isabella's red lips parted slightly, and she looked at Teacher Britney in astonishment. She is a student of Britney, so of course she knew what co-authorship meant.

Although this formula is not a major discovery, its thinking is very ingenious and has groundbreaking significance. It is foreseeable that it will even appear in future textbooks. That is to say, it is very likely that what she learned in the future In the textbook, the Britney Blair formula will appear...

Since then, in the Kingdom of Lorraine, and even the Continent of God, all beginners in mathematics cannot avoid Blair's name.

Thinking of this, she suddenly felt a sour feeling in her heart,

For Chen Luo, it doesn't matter if he signs or not. All he cares about is magic. Giving him a signed paper that is useless is better than giving him some silver coins.

Casting magic is a mentally and physically exhausting thing. With two pieces of bread a day, Chen Luo can't get enough to eat. Blair's meager savings can't last even half a month. He came to this world The biggest problem is actually filling the stomach.

Teacher Britney seemed to have thought of something, handed him a small cloth bag embroidered with flowers, and said, "This is fifty silver coins, a reward from the Mathematics Association, I think it should belong to you..."

Chen Luo's salary as a handyman in the library includes food and housing, two silver coins a month, and fifty silver coins. He needs to earn two years and one month.

No wonder Britney said that scholars and magicians are also respected in this world, not only respected, but also very profitable.

With these fifty silver coins, he won't have to worry about being hungry for a long time.

Of course, Chen Luo would not refuse foolishly, stretched out one hand to the purse, and said politely: "How embarrassing, at least half of the credit is due to Mrs. Britney..."

"Then I'll take half of it." Teacher Britney took back the money bag, took half of the silver coins from it, and handed the rest to Chen Luo.

"..."

Because of his polite words, the fifty silver coins were reduced by half, and Chen Luo wanted to slap himself.

However, it seems that Teacher Britney is not a wealthy person, so Chen Luo no longer cares about it. Without her, it is impossible for the paper written by Chen Luo to be valued by the Mathematics Association, and it is very likely that it will not be submitted for review. man's hand.

Even so, Chen Luo still felt sorry for the twenty-five silver coins. He thought for a while, and suddenly said: "I was thinking recently, if a set of numbers starts from the second item, the ratio of each item to its previous item are equal to the same constant, then their sum is also the same as the previous situation

The shape is the same, can it be described by a unified formula? "

The summation formula for the arithmetic progression has been released, and the arithmetic progression cannot be left behind. After all, this is another fifty silver coins...

Teacher Britney looked at him suddenly, and asked, "You mean the mystery of Raus?"

"????" Isabella looked blank: "What mystery?"

Chen Luo spent the past few days in the library and almost finished reading the history of magic, mathematics, and science. Hearing this, he nodded: "Yes."

These days, Chen Luo was surprised to find that the law of the development of mathematics seems to be unified, whether it is the mystery of Amers in ancient Egypt in another world, or the "going out to look at the nine dikes" in the ancient Chinese "Sun Tzu Suan Jing", It is still the "Raus' mystery" in this world, and it is a problem of geometric sequence.

The description of the mystery of Raus is: Raus has seven wives, each wife has seven pockets, each pocket contains seven cats, and each cat has seven children, ask the wife, pocket, big cat, small How many cats are there...

This problem seems a bit boring, no one will add these things together, people may be more concerned about the health of Raus's kidneys than these irrelevant things, but if you look at it as a purely mathematical problem , is still necessary for research.

As a geometric sequence, there are not many items in the riddle of Raus, and the answer can be obtained by adding each item, but what if there are ten, twenty, or fifty items?

If there is a formula that can summarize the sum of arrays with this law, this is another major discovery in the mathematics world.

Different from the arithmetic sequence, the geometric sequence actually appeared earlier, and it corresponds to the famous Rausian riddle. If you can use a simple formula to solve the Rausian riddle --- the Mathematical Association will not reward one A hundred silver coins is a bit unreasonable, right?

Teacher Britney asked: "You mean, you can use a formula to summarize problems such as the mystery of Raus?"

Chen Luo nodded and said, "It's just a little preliminary progress."

Teacher Britney grabbed his wrist excitedly and said, "Go to my room and talk!"

Seeing Teacher Britney dragging Chen Luo towards the teacher's dormitory building, Isabella stomped her feet and quickly followed after being ignored.

...

The derivation of the formula for the sum of geometric series is very simple, but before modern times, the development of both mathematics and science was very slow, not to mention that in this world that pays more attention to magic, mathematics and natural science are sprouting in Chen Luo's eyes Stages are not called.

Teacher Britney has a good foundation in mathematics. Once inspired by Chen Luo, she picked up the quill and wrote down a few lines of derivation on the paper.

Looking at the formula she derived, Britney brought in several arrays similar to the Rausian puzzle, and came to the same conclusion as she added one by one with addition.

"It's unbelievable. We are about to solve the mystery of Raus." Teacher Britney's beautiful eyes were shining, she looked at Chen Luo, and said in admiration: "Blair, your mathematical talent is unparalleled, you are really amazing. Would you like to study mathematics with me?"

"Goo..."

Chen Luo didn't answer, but his stomach responded.

The last class in the morning is history class, and now it's time for dinner.

"I almost forgot, you haven't eaten yet." Teacher Britney ran into the kitchen in a hurry, took out two cakes, handed them to Chen Luo and Isabella, and said, "You guys have something to eat first, I Calculate a few more times..."

Chen Luo took the cake and finished it in two bites. It was the best thing he had eaten in the past few days.

Isabella looked at Mrs. Britney who was indulging in mathematics, and knew that this was another great discovery. She had expected that a new "Britney-Blair" formula might come out soon.

Originally, her competitive spirit drove her to compare with Blair, how can she compare now?

She took a bite of the cake in her hand, only to feel that her favorite dessert before suddenly became less sweet...

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