user-avatar
quyen97
2 năm trước
cho phương trình x^2 - 8x + 15 có hai nghiệm x1, x2 hãy tính: $\frac{1 - x1}{x1}$ + $\frac{1 - x2}{x2}$
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

. CONDITIONAL SENTENCES(ghi rõ đáp án ra nhé) Exercise 1. Choose the best answer to complete the following sentences. 1. If he ______ the truth, the police wouldn’t arrest him. A. tells B. told C. had told D. would tell 2. If you had caught the bus, you _____ late for work. A. wouldn't have been B. would have been C. wouldn’t be D. would be 3. . I am very thin. I think, if I _____ smoking, I might get fat. A. stop B. had stopped C. will stop D. stopped 4. If _____ as I told her, she would have succeeded. A. she has done B. she had done C. she does D. she did 5. Will you be angry if I _____ your pocket dictionary? A. stole B. have stolen C. were to steal D. steal 6. You made a mistake by telling her a lie. It _____ better if you _____ to her. A. would have been / hadn't lied B. would be / didn't lie C. will be / don't lie D. would be / hadn't lied 7. John would be taking a great risk if he _____ his money in that business. A. would invest B. invested C. had invested D. invests 8. Would John be angry if I _______his bicycle without asking? A. take B. took C. had taken D. would take 9. She _______terrible upset if I lost this ring. A. will be B. would be C. were D. had been 10. If someone______in here with a gun, I would be very frightened. A. would walk B. walks C. had walked D. walked 11. What would happen if you _______to work tomorrow? A. don’t go B. didn’t go C. won’t go D. wouldn’t go 12. We ‘ll get wet if we ________ out. A. go B. did go C. went D. had gone 13. If I go shopping, I ______some food. A. buy B. will buy C. would buy D. would have bought 14. If I find it, I ………you. A. will tell B. would tell C. had told D. told 15. What would you do if you_______a million dollars? A. would win B. win C. had won D. won 16. They‘d be hurt if I ________. A. don’t go B. didn’t go C. hadn’t gone D. wouldn’t go 17. If we took the 6: 30 train, we_______ too early. A. would have arrived B. arrived C. will arrived D. would arrive 18. You won’t pass the examination _______you study more. A. as long as B. unless C. if D. whether 19. If I were in your place, I _______a trip to England. A. will make B. had made C. made. D. would make 20. If I _______you, I’d save some of your lottery winning. A. be B. were C. am D. was 21. If I had enough money, I _______abroad to improve my English. A. will go B. should go C. would go D. should have go to 22. If I _______ I would express my feelings. A. were asked B. would ask C. had been asked D. asked 23. If the wall weren't so high, he _____ it up to take his ball down. A. climbed B.could climb C. is climbing D. climb 24. . She wouldn't have given them all that money if we _____ her to. A. wouldn’t advise B. won't advise C. hadn't advised D. didn't advise 25. I would have visited you before if there _____ quite a lot of people in your house. A. hadn't B. hadn't been C. wouldn't be D. wasn't

Bài 1_T86: Theo em khi xét một mô hình dữ liệu quan hệ ta cần quan tâm những yếu tố nào? Bài 2_T86: Hãy nêu các khái niệm cơ bản mà em biết về hệ CSDL quan hệ. Bài 3_T86: Những tiêu chí nào giúp ta chọn khóa chính cho bảng? Hãy cho ví dụ và giải thích. Bài 1_T93: Hãy nêu một công việc (trong gia đình hay xã hội) có thể dùng máy tính để quản lý. Bài 2_T93: Trong cơ sở dữ liệu được nêu ở câu 1, hãy cho biết đối tượng cần quản lí và thông tin cần lưu trữ. Bài 3_T93: Khi nào thông tin trong CSDL nói trên cần đực cập nhật và cập nhật những gì? Bài 4_T93: Khi nào cần kết xuất thông tin từ CSDL nói trên và những thông tin nào cần được kết xuất? Hãy phác thảo một số báo cáo cần có. Bài 5_T93: Hãy cho một ví dụ về truy vấn phục vụ cho việc kết xuất thông tin ở bài toán này.

One of the most successful movies of 2018, Black Panther, tells the story about T’Challa, an African king who possesses (41)___________ power. The power has been passed down from his (42)__________, from a king to his son but this time, T’Challa’s throne is challenged like never before and he must use his power to protect not only the people he love but also the world. However, Black Panther is so much more than just a superhero movie. It celebrates cultural (43) __________. The fictional country, Wakanda, is a kingdom that consists of several different tribes, each with their own distinctive style. The tribes’ (44)__________ costumes, hair styles and chants are all inspired by actual African (45) __________, such as the Mursi Lip plate, the Zulu headdress and the Basotho Blanket.

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team