My subject turned into a beautiful girl

Before the bell rang, someone suddenly slid open the window.

A rare cool breeze swept in during the summer, sweeping away all the stuffiness and filling the room with the faint scent of osmanthus after the rain. The slightly noisy classroom gradually quieted down, and another ordinary evening self-study session began.

It will sink into the memories of many people, until many years later, on another ordinary night, it will suddenly emerge in a daze, carrying the light and shadow blurred by time, and bringing the same faint floral fragrance.

But An Yi is different.

He will probably never forget that evening study session, and the concept of time blurring out doesn't even exist anymore.

This scene will forever remain in his memory as the ultimate, immersive experience!

It's not that anything particularly important happened during this evening study session... well, it was indeed quite important. But the main reason the image was so clear and memorable was that An Yi's [memory ability] received a temporary and significant boost.

In short, it means having a photographic memory.

The experience of having a photographic memory wasn't initially very noticeable. So much so that An Yi, who was completely focused on figuring out "function drawing," even forgot that he had this buff.

Until he looked up the "53" textbook because he lacked the necessary knowledge.

"The eldest brother is truly the eldest brother..."

As he flipped through the pages, he couldn't help but feel a sense of感慨 (gǎnkǎi, mixed feelings).

Xia Qing's "increasing difficulty" is not simply about increasing the complexity of the drawing target's graphic; she also adds different constraints to the graphs of various functions.

For example, the vertex coordinates of a quadratic function, the amplitude and period of a trigonometric function, or a trigonometric function that requires the use of double-angle formulas, sum and difference formulas, half-angle formulas, auxiliary angle formulas, and other knowledge to perform chord-tangent interconversion before it can be intuitively scaled and translated...

If it were just a single, independent function, that would be fine, but drawing represents "lines," which are combinations of functions that intersect with each other.

The eldest brother can be said to have perfectly utilized the graphical properties represented by this intersection. Each knowledge point is interconnected and progressive. If any knowledge point in any link is missing, it will lead to the inability to connect the entire function graph correctly!

At this point, the CASIO graphing calculator came in extremely handy. Because from the most intuitive function graph, An Yi could directly see what the corresponding graph properties were, and if he determined that he hadn't memorized the formula, he could then refer to the textbook for the correct formula.

Then, with the effect of a significant improvement in memory, it is completely memorized.

Regardless of the image properties, formulas, or theorems!

It's like having a bunch of drive shaft parts piled up messily on the ground. If An Yi had to learn everything on his own without any boosts, it would mean he would have to figure out how to install all the parts by trial and error, and he would have to go through most of the parts before installing each one.

Moreover, after installing the back parts, the parts installed in the front might fall off because they were "not remembered well"... Overall, it's an extremely tedious and inefficient process, so it's understandable that it wears down enthusiasm and makes it difficult to persevere.

But now, the "function drawing" learning method and target image given by his older brother directly provide him with the most accurate installation index diagram, while the "significantly improved memory ability" eliminates the possibility of already assembled parts falling off again.

As for the trigonometric constant transformations that might cause problems? [Computational power greatly improved] It had already shown its potential before, and now it is still as powerful as ever.

As long as An Yi remembers and understands the formulas necessary for the calculation, he can complete the calculation.

Moreover, this calculation isn't just about seeing the result; the complete derivation process can also be visualized in the mind. He arrives at the answer instantly simply because the calculation speed is so fast, almost instinctive!

Therefore, his learning process regarding functions can be said to be completely free of difficulty!

Gradually, An Yi opened the textbook less and less often, because he had memorized all the formulas, theorems and properties related to functions, and had thoroughly understood them as he drew function graphs.

Since starting high school, he has never felt that studying is so easy, so easy that it is addictive!

Unsurprisingly, he was completely absorbed in his performance and didn't notice Xia Qing's reaction to it.

"This kid is probably playing hard to get with me!"

Seeing An Yi's seemingly "not even going to act anymore," this was the first thought that popped into Xia Qing's mind.

When anyone sees a van that has been broken down for a long time suddenly speeding up a straight track faster than a Maybach with full gas and speed, their first reaction is unlikely to be, "This Wuling is really trying."

If the van was actually a Bugatti Veyron, that would make sense.

But a Bugatti Veyron wouldn't normally break down, especially not when it's disguised as a van... Thinking about it that way, it's more like a "watch me play the sweet trick and then get out of there" scenario!

Xia Qing felt she needed to verify this.

An Yi, who was engrossed in studying, was interrupted by a draft paper shoved in front of her eyes. On it was written a line of text: "Do you have any math exam papers and answer sheets from previous tests? Any kind is fine, the more the better."

My older brother wants to see my exam paper and answer sheet. Is he trying to find all my shortcomings so that I can make targeted improvements?

Oh dear, oh dear, how could I accept this!

With great enthusiasm, An Yi pulled a bulging black folder from his desk drawer, opened it, and pulled out a mixture of test papers and answer sheets, which he then presented to Xia Qing.

At this moment, he had a rather magnanimous feeling, like, "Since I already owe so much, I might as well owe even more..."

The process was quite simple, as he simply put all the exam papers and answer sheets together. The only rough categorization was based on the subject, placing them in different plastic inserts.

When An Yi collected these test papers and answer sheets together, her idea was quite good—when she had time, she would review each answer sheet, summarize the reasons for the mistakes and the relevant knowledge points, and then make targeted corrections to improve her grades... It was similar to the effect of a mistake notebook.

Of course, this idea was basically the same as his previous "study plans"—it was only started and never followed up.

In any case, it made it easier for Xia Qing to verify.

Whether something is fake or real, those who know their stuff can easily tell the difference. But in mathematics, a subject that takes "if it works, it works; if it doesn't, it doesn't" to the extreme, the truth will come to light simply by looking at the answer sheet and the rough drafts on the exam paper.

"This doesn't seem like an act..."

After quickly flipping through the pages, Xia Qing felt a little uneasy.

But how do we explain An Yi's demonstrated learning efficiency?

With this level of learning efficiency, there shouldn't be any situation where you feel "frustrated or confused while learning"!

High efficiency means low difficulty. When learning math is no different from reading a light novel, who wouldn't want to learn math?

Is it that they don't want to learn? No, it's that they can't learn!

"Was he once a genius, but something happened to bury his talent?"

Xia Qing thought of the opening plot of "Battle Through the Heavens," one of the online novels that had been circulating in her class recently, and became even more curious.

Geniuses are nothing special; heroes are as numerous as carp crossing a river, and she herself was one of them. But to speak of a "fallen genius," that was truly the first time she had ever seen one!

But how could this guess be confirmed? Xia Qing began to ponder again.

This area of ​​knowledge is a complete weakness for her, so she can think about it for a while.

An Yi was naturally unaware that Xia Qing had mistaken him for "Xiao Yan - Study Version". After handing the test answer sheet to Xia Qing, he threw himself back into his studies.

The feeling of knowledge constantly flowing into the mind, finding its proper place to settle, and becoming a permanent project is truly fascinating.

So it turns out that learning can be addictive!

As the bell rang to signal the end of the first period of evening self-study, the once quiet campus gradually grew louder and noisier, as if the teaching building had awakened after a brief slumber.

In the past, An Yi would usually get up and move around for a while at this time, but this time he sat firmly on the bench as if glued to it, and the laughter and commotion inside and outside the classroom could not distract him in the slightest.

He had entered this state of concentration many times while playing games or reading novels, but this was truly the first time he had done it while studying.

This focus continued until he had finished writing and inputting all the relevant function equations for a painting, and after pressing the F6 key, he watched as the function graph was drawn on the screen with precise and perfect strokes.

An Yi let out a long sigh of relief. After completing a short-term goal, he inevitably had to temporarily withdraw from that state, and he could only re-enter it when he started the drawing and writing of the next painting.

After relaxing, his attention wandered, and just then, a girl named Liu Jiahui came over to ask Xia Qing a math question.

As the perennial top student and the class leader, Xia Qing always accepted all questions from her juniors.

The younger brothers all reached a consensus: they would never bother their older brother with ordinary problems, thus wasting his precious time. Instead, they would first seek help from the other top math students in the class. Only if the top students couldn't solve the problem would they then seek help from the genius.

Liu Jiahui is one of the top math students in the class. Her math scores usually hover around 130 or 140, and she has even gotten full marks on easy tests.

However, the difference between top students and geniuses really reflects the saying: "You can get a perfect score because your ability is the highest you can get, while others get a perfect score because the test paper only has a maximum score of one."

So far, no one has ever seen a question stump Xia Qing. Even when she occasionally encounters a question beyond the syllabus, she will simply say, "This question is beyond the syllabus," and then give the correct answer.

In mathematics, her skill is like that of the hidden master in "Demi-Gods and Semi-Devils"—profound and unassuming!

This statement was quite popular when it first came out, but as the invincible image of the eldest brother getting full marks in every exam, no matter how difficult, was established, it became somewhat outdated.

Ultimately, following a discussion of unknown origin, this outdated statement was met with strong resistance from the younger members of the class. They generally felt that, given the current situation, it was a form of belittling the older brother, and thus they upgraded and updated the statement—

The eldest sister is indeed a hermit in ordinary times, but that's because she doesn't want to reveal her true strength. If one day she's really pushed too far by something, she'll shed her mortal form and display her "Great Mighty Heavenly Dragon" technique, or she'll pull out her travel permit and say, "This humble monk comes from the Great Tang Dynasty in the East, and the border is right behind me..."

There was a time when An Yi had experienced what it was like to be a prominent figure like the eldest brother.

However, this glorious moment dates back to before he came to Jingjiang City to study, that is, to the first to third grades of the village primary school. The quality of his achievements can no longer be described as gold mixed with sand, but rather a pile of sand mixed with a few gold atoms... so he has never been too embarrassed to mention it to others.

"Big brother, how do I do this problem?" Liu Jiahui squatted down next to Xia Qing and asked in a low voice.

Upon hearing this, An Yi prepared to ignore it and continue his "function drawing" project. It felt wonderful that learning had become so simple, but the thought that this "simplicity" was time-limited naturally made him feel a sense of urgency and that he shouldn't waste time.

To be honest, and perhaps it was just a feeling, An Yi had a vague sense that he seemed to have almost mastered the knowledge of functions!

This feeling was so bold that he almost immediately rejected it in his mind... How much time has it taken him since he officially started learning?

It's just a few classes, at most two or three hours!

In just two or three hours, he had completely mastered such a vast amount of knowledge?

Impossible, absolutely impossible!

But for some reason, he felt as if there was a voice in his heart speaking, or more precisely, questioning him.

The voice asked, "What exactly are you denying? What are you not believing? Are you denying the benefits of the cheat system, or are you not believing in your brother's abilities?"

The voice questioned him repeatedly, sharp as if scratching at his heart with fingernails, making An Yi's heart itch with curiosity and making him impatient to verify it. It seemed that only in this way could the voice stop.

But just then, he heard Xia Qing's voice.

"This question...perfect, An Yi?"

"Um?"

An Yi was taken aback, and then saw Xia Qing hand over the test paper. She pointed to a question on it, "Take a look, can you solve it?"

Liu Jiahui was also stunned at the same time.

She didn't know An Yi's exact math score, but she was certain that he wasn't among the "essential math geniuses" before. And now, this problem, which stumped all of them—whose average math score was over 130 or 140—and who had to ask their older brother for help... their older brother actually asked An Yi if he knew how to solve it?

What's going on?

Before she could analyze any possible outcome, she heard An Yi's reply.

The voice was very natural, as if it were a question with an easy answer that could be answered at a glance.

Yes.