After dinner in the cafeteria, he watched Zhou Qianqian leave.

"Damn it, where did you get such a pure junior girl?" Until Zhou Qianqian couldn't see her back, Zhang Haitao immediately asked Li Hua.

"I know you in the library. Don't always use your phone when you have time. Go to the library more often. There are the most girls there." Li Hua laughed and replied.

"I believe you! It's inconvenient to speak in the library, how can you meet a girl?" Zhang Haitao didn't believe Li Hua's nonsense at all and suggested: "If it's a buddy, you should let the elementary school girl's dormitory connect with our dormitory!"

"This one can be there, Lao Li, can we get out of singleness? I'll count on you!" Lin Zhikun's eyes lit up, he looked at Li Hua, and asked.

"No problem, I'll ask about it another day." Li Hua nodded with a smile.

After returning to the dormitory, Lin Zhikun went to wash, Zhang Haitao picked up his phone and continued to browse his phone. Li Hua sat at the desk, and on the surface he was reading with a textbook, but in fact he was improving his skills.

"Ding, you used a skill point for calculus, and the calculus was upgraded to intermediate level, and you obtained skill attributes: precision calculation, skill effect: calculus ability increases by 25%, and calculation accuracy increases by 23%.

A sound rang out of thin air in his mind, and then Li Hua felt a large amount of calculus-related knowledge pouring into his brain.

The main contents of differentiation science include: limit theory, differentiation,..., and the main contents include: fixed integral, indefinite integral,..., Integral is the inverse operation of differentiation, that is, knowing the derivative function of the function, inversely finding the original function,...

Calculus is mainly used to find the mutual calculation of velocity and distance in motion, to find the tangent of the curve, to find the length, area, volume, and center of gravity, to find the maximum and minimum values, etc. Some mathematical problems that cannot be solved in primary mathematics play an important core role in the subject of mathematics.

This time, it took Li Hua about ten minutes to digest the calculus knowledge in his mind.

Then, Li Hua looked at the advanced mathematics textbook and did integral mathematics problems to test the effect.

Find ∫(2x3)/(x^22x2)dx.

Following the previous steps, before Li Hua did this question, he had to look through the textbook and look for formulas, example questions, analysis, and then slowly deduce and convert.

Now, after seeing this question, the knowledge reserves in my mind immediately came out. Li Hua understood the meaning of the question without thinking. The next second, the problem-solving steps appeared. After calculating, the answer to the question instantly emerged in his heart.

Li Hua picked up his pen and quickly wrote down the problem-solving steps below the question.

∫(2x3)/(x^22x2)dx

=∫(2x2)/(x^22x2)dx∫1/(x^22x2)dx

=∫d(x^22x2)/(x^22x2)∫1/[(x1)^21]dx

=ln(x^22x2)arctan(x1)c

Lin Zhikun finished his personal washing and came out of the toilet. He passed by Li Hua and happened to see this scene. A look of surprise immediately appeared on his face.

"Damn it! Old Li, you are doing math problems! Is the answer OK? I am worried if I can guide me!" Lin Zhikun looked at Li Hua in surprise and said in surprise.

If it were in the past, when facing Lin Zhikun's request for help, Li Hua would be a clay Buddha crossing the river and would be unable to protect himself.

Now!

With the skill system in hand, Li Hua had the illusion of omnipotence when he was a little bit of skill.

"What question is it! Take it here." Li Hua smiled and said boldly.

Lin Zhikun was not polite, so he immediately put down his washing tools, quickly took a piece of manuscript paper from his desk, and walked to Li Hua.

"Just look at the question on this piece of paper, can it be solved?" Lin Zhikun put the question on the table and said with some confidence in Li Hua.

Li Hua took on the question and frowned after reading it.

"How is it? If it doesn't work, I can only go to Lao Fang." Lin Zhikun asked with concern.

Lao Fang is their math teacher. He is serious and imposing, not easy to talk to. Generally, there is nothing to do, and his classmates are unwilling to deal with him.

"No problem, I'll go to the bathroom first, and I'll give you the answer in ten minutes." Li Hua smiled slightly, found an excuse to delay time.

"Okay, I'll find you later." Lin Zhikun nodded happily.

Li Hua nodded, got up and walked towards the toilet.

The questions given by Lin Zhikun are mathematical analysis questions. The questions are a bit difficult. Li Hua is really not sure how to solve them based on his own abilities.

Functions, derivatives, calculus, and three sub-skills form the ‘high mathematics’ course and do not include mathematical analysis. Mathematical analysis is an independent sub-skill.

The relationship between "mathematical analysis" and "high mathematics" is like the relationship between "literary novels" and "popular novels". Their basic components are the same. Aside from the outsiders will think that the latter is friendly enough, and their inner "pursuing" is a bit different.

First of all, the concepts they involve are all ultimate differential integrals, which are the basic constituent materials. ‘high numbers’ are directly used in calculations, while ‘mathematical analysis’ is to deduce various conceptual relationships.

Of course, mathematical analysis also has calculations, but generally it is not the ultimate goal, it is just a means. The core purpose of using mathematical analysis is to examine various concepts and their internal connections, that is, to deduce various "theorems".

Close the toilet door, Li Hua squatted while concentrating his consciousness, unfolded the math sub-skill tree, found the sub-skill-mathematical analysis, and used a skill point for it.

"Ding, you used a skill point for mathematical analysis. The mathematical analysis was upgraded to the intermediate level and obtained skill attributes: accurate analysis, skill effect: analytical ability increased by 25%, and analytical effect increased by 25%.

Ten minutes later, Li Hua came out of the toilet in full spirit.

Li Hua sat at the desk, picked up his pen and started the math problem.

Solution: Let x=t/(1-t),∴Original formula =∫(0,1)[t^(1/4)](1-t)^(-1/4)dt=b(5/4,3/4)=Γ(5/4)Γ(3/4)/Γ(2)=(1/4)Γ(1/4)Γ(3/4)=….

"It's solved, you can take a look!" Li Hua finished the problem-solving steps in one go, and then threw the manuscript back to Lin Zhikun.

Lin Zhikun quickly took the manuscript paper and checked it carefully.

After reading the answer to the question, Lin Zhikun immediately showed a sudden look.

"So it's this step, Lao Li, it's amazing! I can't solve this problem. You can get it done in one go. I admire you, admire you!" Lin Zhikun looked at Li Hua and said sincerely.

"It's nothing, I happened to touch the right idea." Li Hua's old face turned slightly red, and he waved his hand and said modestly.

Being able to do this question so quickly depends on the ability given by the skill system. If he is allowed to do it with his own ability, he will probably be stumped by this question like Lin Zhikun.
Chapter completed!