trả lời 

1+1=2

2x3=6

8:2=4

6x4x9=216

chúc bạn học tốt 

1 + 1 =2

2 x 3 =6

8 : 2 = 4

6 x 4 x 9 = 216

hok tốt

1+1=2

2.3=6

8:2=4

6.4.9=216

tk nha

15.16.17.18+321.0+17=4097 nha

15.16.17.18 + 321.0 + 17

= 73 457

2.3.4.5.6.7 +8.0 + 9.10

= 5130

Trả lời:

15 . 16 . 17 . 18 + 321 . 0 + 17

= 73457

Hok tút!

Ta có BĐT cần chứng minh <=>\(\left(x+y\right)\left(x^{2017}+y^{2017}\right)\le2\left(x^{2018}+y^{2018}\right)\Leftrightarrow x^{2018}+y^{2018}+xy^{2017}+x^{2017}y\le2\left(x^{2018}+y^{2018}\right)\)

<=>\(xy^{2017}+x^{2017}y\le x^{2018}+y^{2018}\Leftrightarrow x^{2017}\left(x-y\right)-y^{2017}\left(x-y\right)\ge0\)

<=>\(\left(x-y\right)\left(x^{2017}-y^{2017}\right)\ge0\)

vì vai trò của x,y như nhau , giả sử \(x\ge y\Rightarrow x^{2017}\ge y^{2017}\Rightarrow\left(x-y\right)\left(x^{2017}-y^{2017}\right)\ge0\)

=> BĐT cần chứng minh luôn đúng 

=> ĐPCM 

dâu = xảy ra <=> x=y=1

^_^

Đẳng lập: là từ ghép không phân ra tiếng chính, tiếng phụ. Các tiếng bình đẳng với nhau.

Ví dụ: suy nghĩ, cây cỏ, ẩm ướt, bàn ghế, sách vở, tàu xe, tàu thuyền.

Chính phụ: Là từ ghép có tiếng chính và tiếng phụ bổ sung nghĩa cho tiếng chính. Tiếng chính đứng trước, tiếng phụ đứng sau.

 ~ ủng hộ nha ~

Từ ghép chính phụ: là từ ghép gồm có một tiếng chính và một tiếng phụ. Tiếng chính đứng trước tiếng phụ đứng sau. Nghĩa của từ ghép chính phụ hẹp hơn nghĩa của các tiếng tạo ra nó.
Từ ghép đẳng lập: là từ ghép mà các tiếng tạo ra nó có nghĩa đẳng lập với nhau. Nghĩa của từ ghép đẳng lập khái quát hơn nghĩa của các tiếng tạo nên nó. 

Từ ghép chính phụ: là từ ghép gồm có một tiếng chính và một tiếng phụ. Tiếng chính đứng trước tiếng phụ đứng sau. Nghĩa của từ ghép chính phụ hẹp hơn nghĩa của các tiếng tạo ra nó.
Từ ghép đẳng lập: là từ ghép mà các tiếng tạo ra nó có nghĩa đẳng lập với nhau. Nghĩa của từ ghép đẳng lập khái quát hơn nghĩa của các tiếng tạo nên nó.

Bạn đã hiểu chưa?

Hok tot!  (^O^)

 1000+1000x999x998x997x996x...x(số nhỏ nhất)

CƠ HỘI KIẾM K CHO 3 NGUỒI ĐẦU TIÊN

=0 NHA BN 

NHA BN 

Đáp án là 1000 do trong phép nhân sẽ có chữ số 0, cộng với 1000 sẽ ra đáp số là 1000 thôi.

HỌC TỐT NHA!

Topic 1

- I live in a house

- My house has 4 room: living room, bedroom, kitchen and a attic. It also has a small garden to grow vegetables and flowers.

- I lived there for about 10 years

- I live in a small room. In there, it has a brown desk, a gray bed and a balcony looking out

- I like my room because it has many books. I like read  books

- I live with my family

- My family spends most of the time in the living room reading, watching movies, listening to music together

- I’m not live in a flat. I live in a house. In my house, I usually study, read books, and do housework

- I live in a clean, spacious and airy accommodation

- Yes, I plan to live there forever

- I like living in a house

- Yes, It’s very good

- In the future, I want to live in a large villa.  It has many trees, flowers, supercars, robots, and has a swimming pool.  There are many modern and smart devices in the house

- My favorite room in the villa is the book room

- In the past, I lived in an apartment. Now, I live in a house

- Yes, I think so too.  Because when we live in a comfortable environment, we will have better health, and we will be more comfortable mentally.  No matter what, it also gives us more energy

- I think they are wasting a lot of their money. Because we can still live in an affordable house, not necessarily a house that costs a lot of money.

Topic 2:

- No, I haven't worked yet, I'm still a student

-Education plays a big role in our life in building character, improving knowledge, skills and making us feel happy.In our country, education is divided into 3 levels including Elementary, Middle and High Schools aim to develop our analytical skills, character traits and whole personality. Education helps to nurture a person in present and future by ensuring their life purpose. The quality and importance of education is increasing day by day.. Every child must attend school of their appropriate age just as everyone has an equal right to education from birth. The growth and development of any country depends on the quality of the education system in place for young people in schools and universities. However, the education system in each region of a country is not the same due to the difference in human growth and development and the social diversity according to the strong and weak educational systems of the regions. separate domain.

-My school has a lot of good subjects but I like physics the most

-I choose physics because I feel I'm suitable for it

-I like physics because: 1/ Improve logical thinking 2/ The habit of concentration is trained 3/ Practice problem solving skills 4/ Train your mind and ability to be sensitive 5/ Solve problems quickly and effectively

-When I was young, I attended Van Co elementary school

-When I was young, I felt that English was easy, so I liked it

-I think my country is having an effective education system

-No, I don't want to work because I just woke up =)) 

                                                                      _DucTrunggg_

Topic 1: Home and accommodation

- Do you live in a house or a flat?
- I live in a house in th capital of Vietnam.

- Can you describe the place where you live?
- It is a place where buildings are "grown" like "mushrooms". Everything is modern and new. There're lots of supermarkets, shops, restaurants,...

- How long have you lived there?
- I've lived here for 15 years since I was a child.

- Please describe the room you live in.
- It is a white and simple room with some funiture. There's a big glass window in my bedroom. The AC is above it to keep my room cool in the summer. The bathroom is between the wardrobe and the door. My bed is next to a small table. My desk is opposite the window and the TV is opposite my bed.

- What part of your home do you like the most?
- I love my bedroom most, my pictures when I was small are all on my bedroom wall and my bedroom make me feel more unwind after school.

- Who do you live with?
- I live with my parents, sister and brother.

- What room does your family spend most of the time in? 
- We spend most time in the living room. It is the room where we get together and watch TV.

- What do you usually do in your flat?
- I usually do my homework, listen to music and have a call to my family.

- What kinds of accommodation do you live in?
- I rarely live in the flat and the rest of the time I live at home with my family. 

- Do you plan to live there for a long time?
- I just want to live in this flat one more month, the fee is too high, I can't afford it.

- Do you prefer living in a house or a flat?
- I prefer living in my house, I would have more time to gather with my family.

- Are the transport facilities to your home very good?
- Yeah, all the buses to my house are fast and not as crowded as another.

- What kind of house or flat do you want to live in in the future?
- I want to live with my family in a villa near the beach.

- What's your favorite room in your apartment/house?
- My favourite room in my house is my bedroom because I am free to do anything in my bedroom.

- What's the difference between where you are living now and where you have lived in the past?
- In the past, Hanoi was cleaner than now. People were more civilized than now.

- Do you think it is important to live in a comfortable environment?
- Yes, of course. If we live in a comfortable environment, we will have a private space. Comfort will be a necessity in human life. Comfort also impacts our health, fitness, and productivity.

- Why do you think some people invest a huge amount of money in buying houses?
- I think they spend such a large amount of money to buy privacy. Because if we buy an apartment, sometimes we can still be disturbed.

Topic 2: Study

- Do you work, or are you a student?
- I'm a student in grade 10.

- Describe your education.
- I think my school's education is good. The teachers here are all dedicated to explaining difficult lessons to us. They are also very friendly and always direct us to a good future.

- What is your area of specialization?
- Currently, I'm on the badminton club. I'm the best player among the girls. I also like English, literature and Art too.

- Why did you choose to study that major?
- Because I have a strong passion for those subjects and badminton.

- Do you like your major? (Why?/Why not?)
- I love my major because it make me feel more more confident about myself and it is easy to have a job when I can speak English.

- What kind of school did you go to as a child?
- I went to kindergarten, primary school and secondary school. 

- What was your favourite subject as a child?
- When I was a child, my favourite subject is art. When I was small, I hate learning English very much.

- Do you think your country has an effective education system?
- I think my country actually have an effective education system. My country has a lot of schools and free competitions that help us widen our knowledge and become smarter because we are the preschool of the country.

- Are you looking forward to working?
- Yes, I want to make money by myself to help my parents. Now, I am earning money by selling some snacks in my class.

=579 nha

579 nha bạn

123+456=579

HT

Đáp án là : 0

Tk nha!!

9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 x 1 x 1 x 5 x 8 x 5 x 4 x 0 x 2 x 4 x 3 x 6 = 0

Blink chính hãng nhé!

_Học_tốt_

9. .... . 9 .1 . 1 . 5 . 8 . 5 . 4 . 0 . 2 . 4 . 3 . 6 = 0

x³ . 1+x² .1= 2¹¹

(x³ . x² ) . (1+1) =  2048

x⁵ . 2 = 2048

x⁵= 2048 : 2 

x⁵ = 1024

x⁵ = 4⁵

x = 4 

vậy x = 4