Cho B= 2 căn x-5/ căn x+2 1. Tìm B tại x = 16 2. Tìm x biết A=3/4 3.Tìm x biết A< 1/3

lầm gúp nhé 5 sao cảm ơn và tuyệt nhất

tính nhanhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

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Nhanh lên mng ới '-' 30 đ cần gấp ;v Một người đi xe máy xuất phát tại A lúc 7 giờ 20 phút và đến B lúc 8 giờ 5 phút. Tính vận tốc của người đó theo km/h và m/s. Biết quãng đường từ A đến B là 24,3 km.

cm : 3 số nguyên liên tiếp chia hết cho 6

I. Put these sentences into the passive voice. 1. Should they help Jane with the sewing? 2. The mechanic is repairing Judy’s car. 3. Must we finish the test before ten? 4. They use a computer to do that job nowadays. 5. Employers must pay all travel expenses for this training course. 6. Did her story take them in? 7. The bank manager kept me for half an hour. 8. Has he spelt this word wrongly 9. All his friends will see him off at the airport. 10. They used to drink beer for breakfast in England years ago. 11. Someone might have sent the letter to the wrong address. 12. They were cleaning the floor when I arrived. 13. They are digging the hole on the wrong side of the road. 14. They are going to steal your money if you’re not careful. 15. Has anyone ever asked you for your opinion? 16. Alan’s knowledge of art doesn’t impress me. 17. How do people make candles? 18. They can’t make tea with cold water. 19. When is someone going to announce the results of the contest? 20. Nobody informed the police that there had been a mistake. 21. Where will your company send you next year? 22. Who looked after the children when you were away? 23. Look! Someone is feeding the seals. 24. Kathy had returned the book to the library. 25. By this time tomorrow, the president will have made the announcement. 26. The pollution in the city was affecting people’s breathing. 27. Mrs Andrews hasn’t signed those papers yet. 28. Is a student pilot flying that airplane? 29. Where did they hold the 1988 Olympic Games? 30. Do they make those tractors in this country, or do they import them?

tìm giá trị lớn nhất a. A = 4x – x2 + 3 b. B = x – x2 c. N = 2x – 2x2 – 5

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cho số nguyên n chia 6 dư 5 CMR 3^n-5 chia hết cho 7