Tính D=-1-2 mũ 2-2 mũ 3-......-2 mũ 2018 giải thik chi tiết từng bước giải xong mik vote 5 sao cảm ơn giúp mik với ạ

Mong mọi ngưòi giúp mk phần F.chỉ phần F thôi nha

lim x →2 (∛8x+11 - √x+7)/(x^2-2x+2) giúp mình giaỉ ý naỳ với

1. Choose the best answer for each of the following sentences. 20. The road to our village ____________ widened next year. A. is B. will C. can D. will be 21. All planes ____________before departure. A. will be checked B. will has checked C. will checked D. will been checked 22. Gold ____________in California in the nineteenth century. A. was discovered B. discovered C. was discover D. has been discovered 23. This house ____________in 1970 by my grandfather. A. built B. was built C. was build D. has built 24. We ____________ for the examination. A. have preparing B. are preparing C. had preparing D. have been prepared 25. The photos ____________ in a London studio last week. A. have been B. was taken C. have taken D. were taken 26. When the boy____________ the car he was badly injured. A. hit B. was. C. was hit by D. is hit by 27. The letter ____________ to him next week. A. will be sent B. will been sent C. will be sending D. will be send 28. Is the new computer system ____________ next month? A. been installed B. being installed C. be installing D. be installed 29. ____________ to you yet? A. Have the pens being given back B. Have the pens been gave back C. Have the pens been give back D. Have the pens been given back 30. The car ____________ by my father yesterday. A. has been washed B. were washed C. was washed D. washed 31. America ____________ by Columbus in 1492. A. are discovered B. were discovering C. is discovered D. was discovered 32. Parrots and crows ____________ the most intelligent birds. A. were considering B. are considered C. considered D. was considered 33. She still can’t believe! Her bicycle ____________ last night. A. was stolen B. was stealing C. were stolen D. stole 34. Your bill should ____________ before you leave the hotel. A. be paid B. is paid C. are paid D. was paid 35. English ____________ since 2002. A. have been learned B. has been learnt C. has to learn D. have to learn 36. Grass ____________ by fat cows on the green meadow. A. are eaten B. was being eaten C. were being eat D. was been eaten 37. Mary traffic accidents ____________ by dangerous driving. A. cause B. caused C. are caused D. which are caused. 38. Many people believe we can look forward to the day when even our household jobs like cleaning and decorating ____________ by computer-control robots. A. will be doing B. are being done C. would be done D. will be done 39. A cake will ____________ for your birthday. A. made B. be made C. being made D. to be made 40. Your eyes should ____________ again. A. test B. be test C. be tested D. be testing

Giải dùm mình với Cần gấp Đề: Rút gọn biểu thức

Giups mình với ạ mk cảm ơn nh nha 3. Viết 1 đoạn văn từ 8 – 10 câu làm rõ nội dung sau: “Lòng yêu nước là một truyền thống quý báu ngàn đời của dân tộc ta được tiếp nối từ đời này sang đới khác, từ thế hệ trước đến thế hệ sau.” III. Tập làm văn Chúng ta đang sống trong những ngày cả thế giới chìm trong đại dịch COVID – 19 đang từng giờ, từng ngày đe dọa cuộc sống của chúng ta. Nhưng bên cạnh đó ta cũng được chứng kiến biết bao nhiêu câu chuyện đầy cảm động của biết bao con người đang lặng thầm đóng góp một phần nhỏ bé của mình trong cuộc “chiến đấu” đầy cam go thử thách đó. Bằng những hiểu biết thực tế của mình em hãy viết 1 đoạn văn nghị luận khoảng 2/3 trang giấy nêu suy nghĩ của em về đại dịch này

Hệ phương trình chứa tham số Mn và thầy cô giúp em với ạ

Bài 3. a. Tìm 4 góc của một tứ giác biết rằng các góc lập thành một cấp số nhân và góc lớn nhất gấp 9 lần góc lớn thứ hai b. Tính tổng tất cả các số hạng của cấp số nhân biết số hạng đầu là 18, số hạng thứ hai là 54, số hạng cuối là 39366

giải gấp giúp em bài này ạ ghi đầy đủ rõ ràng có bước trung gian B20:tìm x c) (x-25):3=-8 e)64-3x=124 f)-3x+1=25-32 g)143-2.(x+1)=-69 h)76-5.(3-2x)=181 B22: tính hợp lí a) (27-7).(-4)+31.(-12-8) b) 135+(-241)-135+141 c)(43-13).(-9)+21.(-16-14) d) -(153-170-915)+(15+153-170)

1. Choose the best answer for each of the following sentences. 1. You will be ____________ a calculator on your birthday. A. gave B. give C. given D. to give 2. Each workman ____________ 50,000 dong a day to do the work. A. pay B. is paid C. paying D. are paid 3. Your dog should ____________ inside the fence. A. be kept B. be keeping C. keep D. kept 4. The winner will ____________ a gold watch by the organizers. A. award B. awarding C. be awarding D. be awarded 5. English ____________in most international conferences. A. spoken B. is speaking C. be spoken D. is spoken 6. Cheese is ____________from milk. A. make B. making C. made D. be made 7. Raw fish ____________often eaten in Japan. A. are B. were C. is D. was 8. The window _____________ last week. A. is cleaned B. was cleaned C. are cleaned D. cleaned 9. This passage should ____________ carefully. A. read B. is read C. be read D. be reading 10. These clothes should ____________ in hot water. A. be washed B. washed C. not be washed D. not washed 11. Her wedding ring ____________ of yellow and white gold. A. is made B. is making C. made D. are made 12. Your brother ____________ to the party last night. A. was invited B. were invited C. were inviting D. invite 13. Mr. Ben is ____________ as Wilie to his friend. A. knowing B. knew C. known D. is known 14. Phong ____________ in Binh Duong. A. are born B. were born C. was born D. born 15. My mother is going ____________ this house. A. sold B. to be sold C. to sold D. to sell 16. References ____________ in the examination room. A. not are used B. is not used C. didn’t used D. are not used 17. There’s somebody behind us. I think we are _____________ A. being followed B. are followed C. follow D. following 18. Have you ____________ by a dog? A. bite B. ever been bit C. bit D. ever been bitten 19. The bathroom is being ____________ at the moment. A. was cleaned B. cleaned C. cleaning D. clean 20. The road to our village ____________ widened next year. A. is B. will C. can D. will be