I'm Really Not Faye

Chapter 55 The Logarithmic Tiger, Blocking the Way to Challenge

During lunch at the restaurant at noon, Lynch and other freshmen all appeared on the ring restaurant of the North Castle one after another, sitting by the window, and even able to watch the lush forest landscape outside the Star Boundary Island.

Because the food provided in the restaurant is mixed with a lot of refreshing herbs and memory-stimulating medicines, the apprentices will show up on time no matter what they eat or sleep.

However, at this moment, the entire restaurant also appeared in a scene comparable to the final decisive battle in the third year of high school.

The non-mathematicians chewed on the food that seemed to be drenched in curry sauce, while watching the large book next to them, muttering words.

The “big tome” in everyone’s hands is much thicker than modern Chinese dictionaries. Upon closer inspection, it is a table full of numerical values ​​like excel.

This is a “common logarithm book”, and finally there is an appendix of the trigonometric function table. After the “Mystery Field Theory” course is over, the master apprentices will have one.

Logarithm, when it appeared in high school mathematics class, the algorithm after this power subverted many high school students’ thinking and made mathematics lose its intuition for the first time.

But on the Blue Star, it was once praised as the three major achievements of the 17th century along with analytic geometry and calculus.

Even the well-known Laplace classmate praised it for “greatly prolonging the life of astronomers.”

That’s right, in that era when there were no modern computers, astronomy for the purpose of precise measurement encountered a series of huge and complicated numbers. It may take a year and a half to calculate a simple Planet position by accident.

Just for calculation.

Until the appearance of the logarithm.

It can turn complex multiplication and division into the most basic addition and subtraction.

For example, find the value 8.134×4.252.

Check the logarithm table lg (8.134) = 0.9103, lg (4.252) = 0.6286.

Then add 0.9103 and 0.6286 to equal 1.5389.

Then look up the logarithmic table and look up the 1.5389 power of table 10 = 34.5859, this is the result of the multiplication.

In fact, 8.134×4.252=34.585768, the gap is very small.

The whole process is logarithm check-addition-logarithm inverse check, three steps.

In fact, if more than a dozen numbers are multiplied together, then it is added more than a dozen times.

This is where the natural logarithm table really shines, and division is even more subtraction.

Therefore, a logarithmic table from lg (0.0000) to lg (9.9999) solves the problem of multiplication and division of extremely large values ​​that has been difficult to handle for thousands of years before the advent of computers.

The trigonometric function table has the same principle. It is much more convenient to memorize the actual value of each angle directly than to use the trigonometric formula to calculate the specific angle value. There is also a corresponding inverse look-up table to inverse the angle according to the value.

“How can I recite this?” Seeing the curry sauce spilled on the logarithmic table, apprentice Mo Yifei quickly wiped it clean, and immediately couldn’t help pulling his own hair. He was from an ordinary family and wanted to prove himself, but he was helpless.

Apprentice Liu Kai shook his head, “Don’t be entangled, hurry up, or I’ll see you in the “Mystery Field Theory” lesson from now on. I just inquired about it, and it’s been the same throughout the school year. This is the first way of mystery field theory. Stop the road.”

Suddenly, a whole row of students in the restaurant couldn’t help but shook their heads and smiled bitterly.

They also received an unforgettable notice at The next moment when they received this “Common Logarithm Table”.

During the following period, the lobby on the first floor of the “Basic Library” in the North District will open the “Logarithmic Calculation Test” to be challenged every three days.

The standard for passing is to answer 20 complex calculation questions with a 90% correct rate in 1 minute, so that they are eligible to take the next “Secret Energy Field Theory” course.

This test, whether it is born with excellent calculations or with excellent memory, have their own advantages, so many self-confident talents are gearing up to wait for the official test to start at 8 o’clock tonight.

If it can’t be completed within a month, then it will really have no face to stay in the academy.

Not to mention that if you fail to pass before the end of the semester, you will be sent back to your place of origin and become an apprentice to a former mage.

Looking at Lynch who was both tangled and looking forward to it, his mentality was subtle.

On the one hand, when he turned over the entire “Common Logarithm Table”, it lay quietly in Lynch’s memory palace.

But the crux of the problem is that he does not have to memorize hard, saving ordinary people’s time and effort over the years.

Because the logarithm table is purely a series of numerical values, there is at least the context in the recitation of the text. There is no memory trick at all, and it is even more boring than recitation of the hundreds of Pi.

Shan Linqi had a headache with the inherent time that was wasted during the specific review.

There are 20 questions in 1 minute, with an average of 5 seconds per question.

For those with strong memory, it is necessary to complete a series of additions in a logarithmic table within 5 seconds.

For those with strong calculations, if the logarithm table is incomplete or even the numbers have errors, it is necessary to use own calculations to make up, such as a few cycles to get the specific logarithmic value, which is equivalent to completing a series of additions within 5 seconds, and Complicated calculations that are difficult to predict, including some recall time.

And Lynch flipped through the results from “Memory of Logarithmic Tables” in the Palace of Memory, added calculations, and reversed the results.

The key is that he has to find the value he wants from the dense logarithm table, and it takes at least a second.

Not to mention that his addition and subtraction methods are still not dominant.

Really add dozens of digits, how can he figure it out in a few seconds, and the time for drafting in the palace has run out.

In 3 minutes, he must pass it properly.

In 1 minute, he was in a bit of trouble.

Lin Qi had a headache, and even with the thought of exploring the dragon egg and studying how to use it as a sensor, he was a little weak.

Just now he tried to bite his teeth, the wind blew and shook, and the egg body remained calm, as if waiting for him to take the initiative to feed the rune.

At this time, Zhang Quan, the head of the second-year student house, also arrived at the end of the morning course, and he came over to look for their new rookie group with the dinner plate.

Seeing the scowling faces of everyone, he laughed on the spot, “I almost forgot about it. At that time, I was stuck in a test that took more than a month and almost scared me to death.”

“Chairman, did you not get the reward?” Liu Kai immediately continued to talk.

If this test is passed within one month, certain points will be awarded.

The first day is the highest through the reward of 10 points, and then it slowly drops, until the last week is only 1 point.

Zhang Quan’s expression was embarrassed for a few minutes before he lowered his voice, “Come on, do you think the academy is really so generous? To be honest, at least half of the apprentices passed without points after a month.”

“Because those test questions are gradually decreasing over time.” Zhang Quan said, pushing the flat frame that owns wear for the sake of gentle temperament.

“Every year there are tens of thousands of apprentices in the entire North District, and they can pass on the first day, no more than two palms. The complexity and disgusting degree of the subject are beyond your imagination.”

“So we ordinary people, we just wait until the difficulty becomes low before going. Otherwise, it will be the fate of cannon fodder at the beginning, and we will be simply beaten. Of course, if you have the genius to recite the logarithm table today, then it should be. I did not say.”

Hearing this, Liu Kai, who was faintly worried that he might hang in this department, patted his chest with confidence, and the meal on the plate was fragrant, and the roommates at the same table also smiled with joy.

It was Guo Sifei, Zhang Ye and other strugglers who continued to gritted their teeth and looked at the logarithm table, and remembered it hard.

Suddenly, another group of people from the dormitory came over, and the tall and strong man said, “Who is Lin Qi, please?”

Seeing the unkind people coming, the roommates around suddenly stood up. In the college, there is no class division system, so everyone’s sense of collective honor comes more from the ease in the same dormitory.

The tall man sneered, “It’s nothing, it’s Zhang Qi, our boss of the North 12th dormitory. I want to take a gamble with you on this test.”

“Huh?” Lynch raised his eyebrows silently.

“The bet is very simple. Naturally, the one who passes first wins.” Apprentice Gao Zhuang looked smug.

“As for the loser, the next month will not be allowed to take the test.”