1+1/3+1/6+1/10+...+2/Xx(X+1)=1 và 2009/2010

lm giúp mik vs chỉ có 1 câu thui à 6^2. 3^8.2^8-6^5(6^5-1)

Hãy tạo một dãy gồm 10 số nguyên được tạo ngẫu nhiên từ n (1≤n≤15). Viết chương trình tìm dãy con liên tiếp tăng dài nhất (dãy con tăng phải có ít nhất hai phần tử). Kết quả ghi vào tệp DAYCON.OUT là các phần tử của dãy con tìm được. Nếu không có dãy con tăng nào thì ghi KHONG. Nếu có nhiều dãy con dài nhất thì ghi luôn các phần tử của dãy con đó vào têp ở dòng tiếp theo.

Trung bình cộng của 3 số là 32, biết số thứ nhất bằng tổng của 2 số còn lại. Tìm số thứ nhất

helppppppppppppppppppppppp :(((

xin tài liệu bài "bài thơ về tiểu đội xe không kính" ạ

giúp mik bài này với nhanh,đúng vote tlhn nhé cảm ơn trc

dichj cho mik vs Lunar New Year Festival often falls between late January and early February; it is among the most important holidays in Vietnam. Officially, the festival includes the 1st, 2nd, and 3rd day in Lunar Calendar; however, Vietnamese people often spend nearly a month celebrating this special event. Tet Holiday gets its beginning marked with the first day in the Lunar Year; however, its preparation starts long before that. The 23rd day of the last Lunar month is East Day—a ritual worshiping Kitchen Gods (Tao Cong). It thought that each year on this day, these Gods go to heaven to tell Jade Emperor about all activities of households on earth. On New Year’s Eve, they return home to continue their duties as taking care of families. On New Year’s Day, the first ones who come to visit households—called first-foot—are very important and hence need to be well chosen, as they believed to hold in their hands the entire luck of the family in New Year (Tan Nien). After that, till the third day or even the fourth day of Tet, individuals meet relatives, friends, and colleagues, wishing them all kinds of good things like happiness, health, and success.

1. They ______ very noisy just now; they’re usually so quiet. A. are B. are being C. have been D. were 2. They’ve got too much luggage, ______? A. do they B. didn’t they C. haven’t they D. don’t they 3. If I ______ an angel, I would try to make all the children happy. A. am B. have been C. was D. has been 4. Actually, today I feel ______ than I did yesterday. A. bad B. worse C. worst D. the worst 5. He asked me if I ______ on time the day before. A. would arrive B. arrive C. have arrived D. had arrived 6. She worked with your mother two years ago, ______? A. does she B. didn’t she C. don’t they D. didn’t they 7. I sent my friend the books ______ I had written. A. who B. which C. whom D. what 8. At 5 o’clock yesterday evening, I ______ my clothes. A. am ironing B. have ironed C. ironed D. was ironing 9. The house ______ I was born was destroyed in an earthquake ten years ago. A. which B. where C. that D. who 10. Hurry up, or you’ll be late ______ school. A. for B. to C. about D. from 11. He asked her ______ if someone stepped on her feet. A. what she would say B. what would she say C. what will she say D. she would say what 12. Although she is very popular, she is not ______ her sister. A. pretty as B. as pretty C. prettier than D. more pretty than 13. I’m still looking for a job but I hope ______ something soon. A. to find B. finding C. for finding D. find 14. There are ______ candidates who want to work in our organization. A. much B. a few C. a little D. any 15. Will you be angry if I ______ your pocket dictionary? A. stole B. have stolen C. were to steal D. steal 16. My father is very good at ______ the guitar. A. playing B. to play C. play D. plays 17. Although she is very weak, she did not take ______ medicine. A. many B. any C. some D. a few 18. Do morning exercise ______ eat more fruit and vegetables. A. but B. or C. and D. so 19. It’s sometimes _______ when you have to ask people for money. A. embarrassing B. embarrassed C. embarrass D. embarrassment 20. "Would you like to join this Green Project with us?" - "____” A. Yes, I would B. Why not? C. I'd love to D. It doesn't matter. 21. Viet Nam has kept a variety of superstitious ____ about daily activities. A. believe B. believing C. beliefs D. believable 22. Maria tried to read a novel in French; ______, it was too difficult. A. so B. although C. however D. and 23. My friends were so _______ at what I told them yestereday. A. interested B. terrified C. surprised D. exhausted 24. In my family, my father always takes charge of doing the ________ lifting. A. strong B. hard C. heavy D. huge 25. " ___________" - "That's a good idea." A. What about recycling water for gardening? B. Sorry, can I say something? C. Glad to work with you. D. Excuse me, I want to add something. 26. If government don't ____ global warming, more natural disasters will occur. A. achieve B. promote C. discourage D. prevent 27. In the UK, 18-year-olds tend to receive a silver key as a present to ___________ their entry into the adult world. A. symbol B. symbolic C. symbolize D. symbolist 28. He likes to _________ a nap for an hour when he arrives home from work. A. do B. get C. make D. take 29. Luckily, my parents are always willing to listen to my new ideas. They're very ___________. A. narrow-minded B. open-minded C. elegant D. careful 30. "How long will the meeting last?" – “____” A. Half past ten. B. Since early morning. C. Once a week, usually. D. An hour or so, I expect

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