Tìm cặp số nguyên tố (p,q) thỏa mãn p+4q và 4p+q là số chính phương

Bài 8. Xét tính tăng, giảm của các dãy số (u n) cho bởi a, (u n) = (n^2 + n +1)/ (n^2 + 1) b, (u n) = (4^n -1)/ (4^n + 5) Giúp em giải với. Em cảm ơn

Giải pt: 21/(x^2 - 4x +10) = x^2 - 4x +6 làm nhanhh giúp mình với mình sẽ vote 5 sao!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Cho tứ giác ABCD và một điểm M thuộc miền trong của tứ giác. Chứng minh: a) MA + MB + MC + MD≥ AB + CD; b) MA + MB + MC + MD ≥ 0.5(AB + BC + CD + DA)

Cho tam giác ABC, đường phân giác AD. Trên các cạnh AB và AC lấy E và F sao cho BE=CF. Gọi M và N lần lượt là trung điểm củ BC và EF. Chứng minh: MN // AD

Giải thích và chọn đáp án giúp mình vs ạ

5 và 4/9 + x - 7 và 7/8 = 15 và 3/4 . Giá trị của x là bao nhiêu

1, They speak Janpanese everyday => Janpanese 2, Tim took his brother to school yesterday => Tim brother 3, Ba feed the cat everyday => The cat 4, My teacher marked all the exam papers => All 5, They drink milk yesterday => Milk GIÚP MIK NHA CẦN GẤP !!!! =>

làm hộ mình đi D. WRITING I. Write the correct form of the words to complete the sentences. 1. He always has a big smile. He is always . (cheer) 2. Now she is very tired, because she spent a night. (rest) 3. That old man has a bad memory. He is . (forget) 4. He does not care about his actions. He is often . (thought) 5. You should throw this pen away. It is . (use) 6. The man does not pay attention to mistakes. He is . (care) 7. The picture has many colours. It is very . (colour) 8. We enjoyed the party. It was very . (joy) 9. She did not show any fear. She was . (fear) 10. He does not have any friends. He is . (friend) II. Complete the directed speech sentences. 1. Mr. Smith said: “Where are you going on your vacation this year?  Mr. Smith asked 2. She said: “Did the mechanics finish repairing your car?”  She asked 3. She said: “Why has David been looking so miserable lately?”  She asked 4. I asked my friend: “Was anyone hurt in the car accident last month?”  He asked my friend 5. She asked me: “How old are you now ?”  She asked me 6. He said to her: “Have you been to town today ?”  She asked her 7. John said: “How long does it take you to get to London, Mary?”  John asked Mary 8. The policeman asked the little girl: “What’s your name?”  The policeman asked the little girl 9. Mr. Green said to his secretary: “Who did you talk to a few minutes ago?”  Mr. Green asked his secretary 10. Paul said: “Can you swim, Mary?”  Paul asked Mary 11. He said: “Where can I find her in this town?”  He asked 12. She asked her son: “Do you know which is the cup you used ?”  She asked her son 13. Helen said: “What did you say, Jack ?”  Helen asked Jack 14. She said to him: “Why didn’t you get up early this morning ?”  She asked him 15. He said: “Will it rain tonight ?”  He asked 16. “Every weekend, the astronauts can have private video-conferences with their families on the Earth,” Dr. Nelson said.  Dr. Nelson said 17. “Have the astronauts ever forgotten anything from the Earth?” Nick asked his teacher.  Nick asked his teacher 18. “The astronauts on the ISS use a 3-D printer on board to print certain objects,” the teacher answered Nick.  The teacher told Nick 19. “Where can we look for life?” Nga asked Dr. Nelson .  Nga asked Dr. Nelson 20. “Ganymede, the largest moon of Jupiter, has a large salt water ocean,” the teacher said.  The teacher said

lãnh đạo thành phố x đã chỉ đạo lắp đặt hệ thống atm gạo để hỗ tfowj người dân chịu tác động của dịch bệnh. Lãnh đạo thành phố x đã tạo điều kiện để người dân hưởng quyền được phát triển ở nội dung nào sau đây