Xueba, I beg you to go and escort him quickly!

Kneel for all support!Thank you! .

Chapter 90

"Besides, the ones that are wrong are those we have learned, Pingting, please tell him the train of thought of the question I just taught you."

Yue Pingting, "Yeah!"

He Junfei was dumbfounded, dumbfounded.

But soon, he returned to normal, and then he set his mind to study.

Before giving him a lecture, Yue Pingting persuaded, "Even I can see that you are eager for quick success!"

"He Junfei, not everyone belongs to Xu Heng!"

"There is only one Xu Heng in the whole city, oh, or in the whole province, it is impossible to have another one!"

Words are like depth charges!

boom!

boom!boom!

boom!boom!boom!

The explosion made He Junfei completely lose his confidence.

"Okay, don't be sad, just go beyond yourself!"

"Let me tell you about this question now."

He Junfei listened carefully, he was indeed wrong, and the mistake was outrageous.

"I see, thank you!"

"Hiss... But Xu Heng, I still want to ask you the last question."

"I know that maybe in your eyes, I'm too eager for quick success!"

"I also admit that I really want to be close to you!"

"I want to reduce the gap between us!"

"But now, I know! Between me and you, I can't compare in my life!"

Yue Pingting reminded, "You don't need to compare studies, but compare other things! For example, appearance, hobbies, etc.!"

He Junfei almost spat out a mouthful of old blood.

"Comparing his looks with him? I'm looking for death!"

"My only hobby is studying!"

Yue Pingting, "Um... sorry, sorry."

He Junfei felt even worse after being told by Yue Pingting.

"After this time, I also know that people can't become fat with one bite. If they take a big step, they will suffer."

"But I've been thinking about this question for a long time, and I still don't have a clue. I hope you can help me!"

Xu Heng sighed, took the test paper, "Okay, let's read the questions!"

topic:

The Chang'e-[-] probe successfully achieved the first soft landing on the far side of the moon in human history, another major achievement in my country's aerospace industry. A key technical problem that needs to be solved to achieve a soft landing on the far side of the moon is the communication between the ground and the probe.

To solve this problem, the Chang'e-2 relay satellite "Queqiao" was launched. Queqiao orbits around the L[-] point of the Earth-Moon Lagrangian.

The L2 point is the balance point, which is located on the extension line of the line connecting the earth and the moon.

Suppose the mass of the earth is M1, the mass of the moon is M2, the distance between the earth and the moon is R, and the distance from point L2 to the moon is r. According to Newton’s law of motion and the law of universal gravitation, r satisfies the equation:

M1/(R+r) square + M2/r square = (R+r) M1/R three times 813 square

Let α=r/R, since the value of α is very small, in the approximate calculation (3α cubic + 3α 3th + 1α 3th)/([-]+α) square ≈ [-]α cubic, then the approximate value of r for how much?

A. (M2/M1 under the root sign) R

B. (M2/2M1 under the root sign) R

C. (3M3/M2 under the square root sign) R

D. (M3/2M3 under the square root sign) R

Yue Pingting came over and was dumbfounded.

"What is this! It's too scary!"

"Just looking at the options of this multiple-choice question, I'm going to be scared to death! Oh my god! All kinds of root numbers!"

"Headache! Headache!"

Xu Heng looked at He Junfei, "Have you read the answer?"

He Junfei shook his head.

"I really want to learn how to answer this kind of question! If it were you, what would you do?"

Looking at Xu Heng, He Junfei looked expectant.

He no longer has the sense of probing, he just really wants to know what Xu Heng will do when he encounters this kind of problem.

Xu Heng, "There should be a lot of standard answers to this question, it's scary."

"But if...give me the pen."

"If these M numbers are set to 1 and converted, the long formula above will be easy to solve!"

Xu Heng wrote lightly, He Junfei didn't dare to be careless, and looked at it seriously.

"Calculate the formula and convert it into this, knowing that R is 1, then alpha, that is, this α is R, and then add the operational formula of r to this operational formula."

"..."

"Finally, 3r cubic = 1, so what is r?"

He Junfei looked dumbfounded, "Yes, it's one-third of the square root of three times!"

Xu Heng, "Yes, put the 1st generation into it, and you will find that only option D is suitable."

He Junfei was stunned, immersed in thinking for a while.

Yue Pingting looked at He Junfei who was stunned, and murmured, "It turns out that no matter how good a schoolmaster is, there will be times when he is in a daze!"

"He Junfei is not much smarter than me!"

Xu Heng took a look at Yue Pingting, "Are there people who really don't have enough IQ?"

Yue Pingting stuck out her tongue, "I don't know if it's not enough, but you, Xu Heng, are far higher than us!"

The average person's IQ is about the same.

But the difference between good and bad learning is too big!

Gradually, many parents will compare cleverness with stupidity.

Over time, many people have defaulted to their own labels.

Before Xu Heng didn't get full marks in the test, wasn't he also the pronoun of "stupid"?

It took He Junfei a while to get confused, and looked at Xu Heng, "Thank you! Thank you so much! Don't bother me!"

Xu Heng stretched his waist.

Yue Pingting took Xu Heng's mobile phone and played the game again.

"Help me play for a while, I'll go to the bathroom."

Xu Heng, "I've never played this game before!"

"It doesn't matter, it is said that it is very similar to LOL, you just play what you want."

Xu Heng controls the hero played by Yue Pingting.

His name is Xuan Ce.

Xu Heng frowned, checking the hero's skills.

Get started and try again.

Check out some more equipment.

"There are indeed some similarities with LOL."

After getting acquainted, Xu Heng tried to arrest him.

"What the hell is this hook?"

Xu Heng sat back in the study and turned on the computer, looking up Xuan Ce's usage skills.

After a general understanding, Xu Heng began to play.

He has hand speed!

He also has consciousness!

After all, he is a senior LOL player, the kind with a very high rank.

Xu Heng made some manipulations.

"Ah! Didn't this kill me?"

"Give me a trace of blood and run away?"

Teammates also sent "!", "Good job!"

Xu Heng, "Uh..."

He finds it very simple.

Xu Heng continued to master this hero.

"Just kill!"

One!

two!

three!

After chasing the fourth one, Xu Heng felt that he could still kill him!

Finally, jump over the tower, one for one.

Teammates and enemies all think that Xu Heng is the ultimate one-for-one exchange!

but--

Xu Heng changed his equipment in seconds, used the resurrection armor, and was resurrected!

Xu Heng, who left the tower, caught up with the opponent's fifth hero, a mage who had lost his ultimate move.

An assassin at full strength, against a mage with half health and no ult.

The result is predictable!

kill!

Xu Heng five kills!

"6!"

"Little brother is amazing! Let's rank together! Why waste time on matching!"

"That's right! We're two rows! Let's go together, little brother! Exactly three rows?"

Some teammates even turned on the mic and called Xu Heng with a loli voice.

"Little brother! Come on!"

"My wild king brother, it's you!"

Vittoria (victory)!