(x^2-xy+y^2).(x+y)=x^3+y^3
(=)x³+y³=x³+y³ (Đây là hằng đẳng thức A³+B³=(A+B)(A²-AB+B²) với A=x và B=y)
Vẽ hai đường thẳng ab và xy cắt nhau tại M.(vẽ hình giúp mik nha) a) Kể tên các cặp góc bù nhau có trong hình vẽ. b) Biết góc aMx = 54 độ . Tính số đo các góc xMb, bMy, và aMy.
Bài 3. Dùng gạch ( /) tách các bộ phận chủ ngữ, vị ngữ trong các câu ghép sau: a.Trên sân trường, các bạn nam đá cầu còn các bạn nữ chơi nhảy dây. b. Sầm Sơn không chỉ đẹp mà nơi đây còn có rất nhiều hải sản ngon.
Complete using the correct form of the words in bold type. REDUCE SENSE MOTOR VARY RISK CRIME, MURDER CONCLUDE POSSIBLE, DIE SOMEONE TO WATCH US There has been a significant (1) ............................... in police popularity in the last few years. That’s why this week a public relations campaign is being launched to make people more (2) ............................... to the role of the police officer. The ads will stress that police do more than just give (3) ............................... speeding tickets. They often act as unofficial social workers, visit schools and talk to students, familiarising them with traffic signs and warning them of (4) ............................... dangers. Being a police officer is (5) ................................, considering that every day they deal with (6) ............................... such as thieves and even (7) ................................ In (8) ................................, the campaign wants to make the public realise that even though in some cases the police’s approach may seem extreme, they cannot ignore the (9) ............................... of injury or even (10) ............................... while on duty.
8/ Use the correct form of verd 1. Everyone (shock) __________ by the terrible news yesterday. 2. English (teach) _____________ in the schools of almost every nation. 3. The mail (deliver / always) ____________ to this office before 10.00 p.m. 4. Glass bottles should (reuse) __________. 5. Don’t (throw) __________everything away after you (use) _________ it. 6. The red house (build) _______________ in the year 1980. 7. Thanh (introduce) _______________ to the secretary of the club yesterday. 8. The classroom (clean) _______________ every day. 9. He (punish) _________ by the teacher because he (throw) _________trash in the school yard yesterday. 10. This computer (export) ______________ to 70 different countries. 11. All the letters (post) _______________ yesterday. 12. Clothes (belong) _________ to “fabric” group. They can (recycle) ____________. 13. The glass was clean because it (wash) ____________by a detergent liquid. 14. My uncle (pay) ________________ a lot of money to write his life story. 15. The newspaper (send) ______________ to every part of the country by train. 16. My mother (make) ___________ tea now. She (drink) ________ tea every morning. 17. Mankind might (live) __________ on the moon. 18. It’s a big factory. Five hundred people (employ) ________ there. 19. Water (cover) ________ most of the Earth’s surface. 20. The letter (post) ________ a week ago and it (arrive) ______ yesterday. 21. The boat (sink) ________ quickly but fortunately everybody (rescue) ________. 22. Ron’s parents (die) __________ when he was very young. He and his sister (bring) _________ up by their grandparents. 23. The gate (lock) ________ at 6.30 pm every day. 24. Sue (bear) _______ in London but she (grow) ________ up in the north of England. 25. We (not/ play) ________ football yesterday afternoon. The match (cancel) _______. 26. Originally the book (write) _________ in Spanish and a few years ago it (translate) ________ into English. 9/ Read the passage and do the exercisee below :(3pts) July 20th 1969 was an important day .Two Americans landed on the moon .They went in a spaceship. Its name was Apollo. On July 20th the spaceship landed in the sea of tranquility . The astronauts walked on the surface of the moon, They picked up some rocks and put them in the spaceship . Then they put a flag on the ground. On July 21st Apollo II left the moon and returned to earth . A/These sentences are True(T) or False (F) a. June 20th was an important day . ____ b. The name of the spaceship was Apollo. ____ c. The astronauts walked on the surface of the moon . ____ d. Apollo I left the moon and returned to the earth on July 21st . ____ B/Answer the questions c. Did two Americans land on the moon ? ……………………………………………………………………………………………What did they pick up from the moon ? ……………………………………………………………………………………………
a/ S1 = 1 + ( -2 ) + 3 + ( -4 ) + ....+ 2001 + ( -2002 ) b/ S2 = 1+ ( -3 ) + 5 + ( -7 ) +....+ ( -1999 ) + 2001 c/ S3 = 1 + ( -2 ) + ( -3) + 4 + 5 + ( -6 ) + ( -7 ) + 8 + .....+ 1997 + ( -1008 ) + ( - 1999 ) + 2000 Tính Tổng
viết đoạn văn ngắn tả cầu thủ bóng đá bằng tiếng anh
Giúp mk vs mk bị trễ deadline r lm đúng hứa vote 5 1. Vùng biển Việt Nam mang tính chất nhiệt đới gió mùa, em hãy chứng minh điều đó thông qua các yếu tố khí hậu biển. 2. Nêu ý nghĩa của giai đoạn Tân kiến tạo đối với sự phát triển lãnh thổ nước ta hiện nay.
Complete the second sentence so that it has a similar meaning to the first sentence, using the word given. Do not change the word given. You must use between two and five words, including the word given. 1. I’m sorry, but I disagree with everything you just said. NOT I’m sorry, but I ....................................................................... you just said. 2. I think I’d rather stay at home than go to the party. TO I think ....................................................................... at home tonight. 3. Do I really need to have the operation? FOR Is it really ....................................................................... to have the operation? 4. It was very careless of you to lose my helmet. MORE You should ....................................................................... my helmet. 5. When we went to stay with my grandparents we always used to have an enormous Sunday lunch. WOULD When we went to stay with my grandparents ............................................................... an enormous Sunday lunch. 6. Neil’s always forgetting where he has left his keys. NEVER Neil can ....................................................................... he has left his keys 7. The weather was better than I’d expected. BAD The weather was ....................................................................... I’d expected. 8. At school we are never allowed to have our mobile phones switched on. US At school the teachers ....................................................................... our mobile phones switched on.
Một bạn học sinh đi học từ nhà đến trường với vận tốc trung bình 4 km/h. Sau khi đi được quãng đường bạn ấy đã tăng vận tốc lên 5 km/h. Tính quãng đường từ nhà đến trường của bạn học sinh đó, biết rằng thời gian bạn ấy đi từ nhà đến trường là 28 phút
Ý nghĩa của hình ảnh hàng tre trong khổ đầu và trong câu kết bài thơ em vừa nêu có giống nhau không? Vì sao? Việc lặp lại hình ảnh hàng tre ở câu kết bài thơ có ý nghĩa gì?
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