Cho một số có hai chữ số, Biết rằng nếu viết thêm một chữ số vào bên phải số đó ta được một số mới lớn hơn số đã cho là 555 đơn vị . Tìm số có hai chữ số đó?

Chứng minh đa thức sau vô nghiệm: g(x) = (3-x) (4+x) - (13-x)

cho p= x-2 . căn (2x-3) tìm giá trị nhỏ nhất của p

Giải dùm mình cái này từ câu exercise 1 đến 3

kể lại tên của vị hoàng đế đầu tiên của nước ta

I.Find the word which has a different sound in the part underlined. 1.A.volunteer B.engineer C.committee D.clear 2.A.population B.volunteer C.offer D.provide 3.A.tutor B.volunteer C.computer D.community 4.A.certain B.compare C.encourage D.community 5.A.charity B.chemistry C.chemical D.mechanic II.Choose the word does not belong to each group. 6.A.donate B.rubbish C. blood D.money 7.A.green B.trees C. collect D.plant 8.A.bank B.environment C. community D.neighbourhood 9.A.blood B.homework C. students D. tutors 10.A.elderly B.grandparents C. nursing home D. orphan III.Choose the best answer A, B, C or D to complete the sentences. 11. We came to the remote village and meals for homeless children . A.cook B.offered C.do D.made 12. You should think of the volunteer activities in your community. A.taking in B.taking part in C.participating D.making 13. Traditional volunteer activities include money for people in need, cooking andgiving food. A.rising B.raising C.getting D.taking 14. You can help young children by them to do homework before or after school. A.doing B.offering C.teaching D.helping 15. Let’s collect and warm clothes to homeless children in our city. A.give away B.give back C.take off D.put on 16. To help people in remote areas, we can transportation, such as giving rides to the elderly. A.give B.bring C.provide D.donate 17. Let’s help the sweet children because they have bad . A.live B.living conditions C.ways of life D.earnings 18. They have decided to ride to work it is good for their health and the environment. A.so B.but C.although D.because 19. Our school has a programme to children from poor families in Ho Chi Minh City. A.ask B.offer C.tutor D.volunteer 20. Americans the tradition of volunteering and helping one another since the early days of the country. A.have had B.has had C.had D.to have 21. Volunteers can do general such as clean-up projects or home repair. A.activities B.things C.labour D.jobs 22. My brother and I a white tiger already. A.have seen B.has seen C.see D.are seeing 23. I blood twice, and presents to sick children in the hospital recently. A. donate - give B.donated — gave C.have donated - have given D.have donated - gave 24. Volunteering is special me because I can help others. A.at B.for C.with D.to 25. How many novels Charles Dickens ? A.does - write B.have - written C.did - written D.did - write 26. We to Ha Noi several times, but last summer we there by train. A.flew – went B.has flown - went C.have flown - have gone D.have flown - went 27.She blood twenty times so far. A.donates B.has donated C.is donating D.to donate 28. He lectures to foreign tourists about traditional food and games recently . A.gives B.gave C.have given D.has given 29. They have decided to clean up the neighbourhood it is full of rubbish. A.so B.but C.although D.because 30. “Have you ever to Sa Pa?” A.gone B.been C.seen D.visited IV. Fill in each blank with ONE suitable word. 31. Community service is the work you do for the of the community. 32. Our club offers for free meals for the sick in this hospital. 33. College students can take part in our programme by poor or homeless children in Ha Noi. 34. The activities of our organization include recycling things and teaching others to do so. 35. Americans do volunteer work not they are forced or paid to do it. 36. I have a lot of old books for village children. 37. Start your own project to make your school a better place. 38. Be a Buddy has evening classes for street children in our city. 39. Last month our organization started a community garden toprotect the environment. 40. The members of the club blankets for poor children who live inmountainous areas last year. V. Put the verbs in brackets in the correct verb tense: the Present Perfect or Past Simple. 41. Someone (turn) on the hi-fi. Do you know that song? 42. The match (just start) . Our team is playing very well. 43. My mother (do) all the cleaning. The apartment is really clean now. 44. He (lose) his credit card. He can’t find it anywhere. 45. Prices (go) up. Everything is more expensive nowadays. 46. (you/buy) the laptop yet. 47. I (have) this iPad for three years3. My father (give) it to me when I was in grade 6. 48. I (watch) the film Titanic already. 49. Miss White (work) in HaNoifrom 2011 and 2014. 50. I (be) to Sa Pa twice since 2000. VI. Fill in each blank with the correct linking word. 51. Paul likes to help the sick he has donated blood several times. 52. Take a coat it’s cold outside. 53. Homeless children are they don’t have enough food, warm clothes and schooling. 54. Nick went to bed early he felt very tired. 55. We went to the nursing home we talked and sang for the elderly.

`(2x)^4` - `(13x)^3` + `(24x)^2` - 13x + 2 = 0 Giải PT

Giải chi tiết với đặt điều kiện giúp mình bài 12 được khoanh tròn với ạ!!! Mình cần gấp!!!

Cho dãy: 1,-5,9,-13,17,-21,25,... a)Viết số hạng tổng quát thứ n của dãy trên b)Tính tổng 2008 số hạng đầu tiên

Phân tích cấu tạo ngữ pháp của các câu sau và chúng thuộc loại câu gì? - Thấy có sẵn cơm canh để phần tươm tất, lại có chậu nước rửa mặt nữa, mỗi lần đi chợ về bà không khỏi ngạc nhiên. - Sau những cơn mưa xuân, một màu xanh non ngọt ngào, thơm ngát trải mênh mông trên khắp các sườn đồi. - Trung Thu này chú không có gì để tặng các cháu. Chỉ gửi tặng các cháu nhiều cái hôn. - Ngày xưa, có hai người khách du lịch đến nước Ê-ti-ô-pi-a. Họ đi khắp đất nước thăm đường sá, núi đồi, sông ngòi. Vua Ê-ti-ô-pi-a mời họ vào cung điện, mở tiệc chiêu đãi và mời họ nhiều vật quý. Sau đó, vua sai một viên quan đưa khách xuống tàu.