Giải giúp em bài này với ạ Em cần gấp lắm rồi anh chị ạ Em cần trước 7giờ15' ạ Hứa trả đủ sao+tìm+ctlhn ạ

cho biểu thức F= (1/x^2-xy - 3y^2/x^4-xy^3 - y/x^3+x^2y+xy^2) nhân (y+ x^2/x+y) a, tìm điều kiện để F được xác định b, rút gọn biểu thức F c, tính giá trị của biểu thức F với x=2010, y=2009 d, tìm cặp số nguyên dương (x;y) để F+2/y có giá trị là một số nguyên

tại sao lại có d: y = 2x+m vậy ạ

I. Read the following text and decide which answer best fits each numbered blank. Technology in education plays an important role (1) _____________ building on the educational skills and knowledge for people. This is very essential, especially those who need (2) _____________ their knowledge. (3)_____________ for them to achieve a successful life in the future. Technology in education is manifested through the use of computers. This is also a great help for teachers (4)_____________ they can already enhance their teaching skills and strategies every time they are facing their classes. There is a variety of benefits which technology brings back. Firstly, students can already learn (5) _____________ their own even without the (6) _____________ of their parents and teachers. 1. A. on B. in C. at D. for 2. A. improve B. improving C. to be improved D. being improved 3. A. so that B. in order C. so in D. in order that 4. A. although B. so C. because D. hence 5. A. for B. at C. on D. in 6. A. assist B. assistant C. assisting D. assistance

Question I. Choose the best answer. (A,B, C or D ) 5. How long _____________ you studied English? A. have been B. have C. has D. having 6. The little cat should be _____________ to be healthy. A. cured B. cure C. cures D. curing 7. Disneyland is _____________ of the most interesting games. A. a house B. houses C. home D. homes 8. She wouldn't go out if she _____________ the weather forecast. A. listens to B. listened to C. listening to D. is listening to 9. My cousin said that she and her boyfriend would get_____________ in the following month. A. marry B. marries C. married D. marrying 10. Hoa told me that _____________ our new teacher of English. A. she wants to become B. she wanted to become C. she will become D. she wanted becoming 11. _____________ in science and technology have changed people's life dramatically. A. developing B. developed C. development D. developments 12. Stephen _____________me he'd bought that suit in a sale. A. said B. spoke C. told D. claimed 13. The little girl asked her father “ _____________ the dress for me?” A. You buy B. You would buy C. You will buy D. Will you buy 14. He suggested _____________ camping that Sunday. A. going B. goes C. went D. gone 15. Elie asked Stand_____________ to look at the new catalogue. A. did he want B. do you want C. if he wanted D. whether he wants 16. They said that we_____________ our houses and devices by our voice in the future. A. can adjust B. could adjust C. adjust D. will adjust 17. At 8 a.m. tomorrow, Janet_____________ a test on the importance of technology in the next 20 years. A. will be taking B. will being take C. take D. was taking 18. The librarian asked us _____________ so much noise. A. don't make B. not make C. not to make D. not making 19. She suggested that they _____________ her a birthday party. A. should give B. shall give C. would give D. will give

bạc có hai đồng vị Ag109(44%) còn lại là xAg.Ntk tn của bạc =107,88.tìm x

giải thích giúp em biểu thức chỗ khoanh tròn với ạ

Tìm min, max của `\frac{2(35x+162)}{17x+129}` với `x>0`

Câu hỏi tình huống : Trong giờ kiểm tra khi mọi người đang làm bài nghiêm túc thì Nga nói với Minh bảo bạn ý hãy mở phao ra đi để 2 đứa cùng chép thế thì điểm mới cao a)em có đồng tình với ý kiến của Nga không vì sao ? b) nếu là Minh em sẽ khuyên nhủ bạn thế nào

"do sombody out of something" và "do someone out of something" đều có nghĩa giống nhau phải không ạ ?