When Lan Ruosi got home, he immediately turned on the light, and then turned on the note to look at it, which read:

Polar coordinate equations

Horizontal: ρ=a(1-cosθ) or ρ=a(1+cosθ)(a>0)

Vertical: ρ=a(1-sinθ) or ρ=a(1+sinθ)(a>0)

Hint: Once you've solved the problem, use a pencil to paint the entire range within the curve and you'll see a miracle!

"What! That's the name! It's clearly a math problem! Gu Xu lied to me! Lan Ruosi was so angry.

She came to the room, picked up the phone and called Gu Xu.

Gu Xu had just walked out of Lan Ruosi's house a few steps when he heard the phone ringing.

Gu Xu smiled silently, didn't the little daughter-in-law see the mystery? Still moved by my confession!

In such a fast time, it is estimated that I didn't see the mystery.

Gu Xu connected the phone: "Gu Xu, you lied to me, obviously said that it was a name, but it turned out to be a math problem." ”

Gu Xu couldn't help but laugh when he heard the complaint on the phone, and sure enough, when a woman fell in love, her IQ was negative.

Gu Xu said softly: "Dear Lan Xueba, that math problem is not difficult, do you want to try to solve it!" ”

"Huh?" Lan Ruosi reacted at this time, "Hmm, hmm......"

With Gu Xu's character, how could he tell her name directly, if he said it directly, it would be too difficult.

Could it be that there is a secret behind this question?

Lan Ruo thought about it and said, "I'll hang up first, you hurry home and call me when you go home!" I'm going to get this secret out of you before you get home! ”

Lan Ruosi looked at the curve, I didn't believe it, I couldn't do it!

"Good!" As soon as Gu Xu finished speaking, the phone had already hung up.

Fool!

With your study and intelligence, isn't it just a matter of minutes?

Looks like I'm going to have to hurry home and give you less time.

Gu Xu thought about it, trotted up, ran directly to the exit of the alley, and took a taxi home.

When Gu Xu returned home, his home was dark and empty.

Along the way, Gu Xu kept holding the mobile phone in his hand and it didn't ring.

It seems that the little daughter-in-law is still stumped.

Gu Xu called Lan Ruosi, and the phone was quickly connected: "Have you made it?" ”

"Uh-huh!" Lan Ruosi replied twice, "Why did you go back so quickly today." ”

Usually, Lan Ruosi felt that he had waited for a long time before Gu Xu arrived home, but today he felt that in the blink of an eye, Gu Xu would be home.

As soon as Gu Xu heard it, he knew that he hadn't made it: "You do it slowly, don't be too nervous, it'll be done in a while." ”

"Uh-huh!" Lan Ruosi didn't say much.

"I'll hang up first!"

Gu Xu hung up the phone and saw a note on the table.

The note reads, Son, 1, that the study room has been renovated according to your requirements.

2, I also told you Aunt Li about the problem of meals in the study room, she is responsible for cooking, profits, half of our family, but I still need to tell you how to do it.

3. I'm not coming back recently, I'm going to the county to sell study materials and snacks.

4. Son, I want to open a supermarket! I'll tell you more when I get back.

Gu Xu looked at the words on the note, Gu Dahai's handwriting was really ugly and crooked. Still, it's good that he's able to list these things so clearly.

Gu Xu wrote on the note, Dad, you actually listed things, it's very good!

1. You stared a lot at the decoration of the study room, and you didn't tell me when it would be done.

2, I have a monthly exam recently, and when the monthly exam is over, we will talk about it in detail. I visually saw that my monthly exam was over, and the study room was not done well.

3. Making money is important, but you also have to pay attention to rest.

4. The idea of opening a supermarket is good, and we will talk about it when you come back.

Gu Xu firmly believes that praise will definitely make people improve, especially people like Gu Dahai.

Sure enough, he saw Gu Dahai's progress bit by bit.

Gu Dahai has suffered too much in society, and he hopes to give Gu Dahai a warm home.

In the same way, he needs a warm home.

When he finished, he turned to wash.

After washing, the phone is still quiet.

This question won't really stump her!

Forget it, let's look at the question for a while and wait for her.

Lan Ruosi's home.

"Haha!" Lan Ruosi finally solved the curve, "It turns out that it's a heart!" He gave me a heart.

Ha!

Gu Xu, so romantic, tell me in this way!

He also said that he should use a pencil to paint the entire area. ”

Lan Ruosi looked at the heart, her heart was sweet, she took out the red signature pen, and traced it little by little along the dot she had just typed with the black pen, depicting a whole heart.

Then she began to paint her heart with a pencil again......

She scribbled and began to see an "L" and her eyes lit up!

She quickly finished the paper, and the LRS imprint was fully visible.

Ha!

This look is that Gu Xu wrote his name the above piece of paper, and then, there was an imprint on this piece of paper, which was shown with a pencil!

A sweet smile appeared on the corner of her mouth, thinking about her and Gu Xu's memories in her mind.

Ha!

She laughed.

"Sisi, you haven't slept yet!" Lan Ruosi smiled and laughed, and suddenly heard Lan Yaqin's voice.

Lan Ruosi hurriedly put away her heart and walked out.

"Mom, you're back." Lan Ruosi looked at the clock on the wall, Lan Yaqin came back early today.

"Today's fruit is all sold out, and I'll be back." Lan Yaqin rubbed her neck, "By the way, I washed and dried your classmate's clothes, you can bring them back to him tomorrow!" ”

"Good!" Lan Ruosi knew that if she didn't return her clothes to Gu Xu for a day, Lan Yaqin would be worried about it in her heart.

Lan Yaqin said, went back to the room and took out Gu Xu's clothes and gave them to Lan Ruosi.

Lan Ruosi took Gu Xu's clothes, her heart was even warmer, and she couldn't help but smile.

She put Gu Xu's clothes on the head of the bed.

Came out again: "Mom, I'm going to wash up and sleep." ”

Lan Ruosi finished washing, closed the door of the room, looked at the clothes at the head of the bed, she walked over and put the clothes on her body.

In an instant, a warm current welled up in my heart.

She took the paper out again and continued to apply it......

It seems that I will have to send Gu Xu a piece of paper tomorrow.

She thought, took out a piece of paper, wrote out the equation that Gu Xu wrote to her, and then added another equation.

Ha!

When she finished writing, a smug smile appeared on her face.

She put Gu Xu's coat on her body and took out her mobile phone to send a message to Gu Xu.

Gu Xu's family.

Gu Xu was working on the question when he heard the sound of information.

I opened my phone and looked, [I solved your question, I gave you another question]

Yoh?

She actually gave me a question?

Gu Xu replied [What's wrong with you? 】

Lan Ruosi quickly replied: [You will know tomorrow? What are you doing? 】

Gu Xu also quickly replied: [I'm doing a question. However, I have to go to bed right now, take care of my spirits, and do your questions tomorrow.]

Lan Ruosi's home.

Lan Ruosi saw the message and replied [Then rest early!] Good night! 】

She looked at the information, and then at the table, her reddened heart, and the more she looked at it, the happier she became.

She had to hide this heart.

Where is it hidden?

She thought for a moment, opened the journal, and put her heart in it.

This place is the best.

Diary!

She suddenly realized that she hadn't written a diary in a long time.

Today is very memorable.

She picked up her pen and began to write......

Today, Gu Xu confessed to me, it can be regarded as a confession, at least I think so.

I thought he would tell me directly who I liked, and who knows, he gave me a question.

After I solved the question, I found that it was a heart......

Lan Ruosi wrote a lot and recorded everything today.

After writing, he wore Gu Xu's coat and slept sweetly.