Tính giới hạn lim(n căn n-2 căn(n+1))

Cho tam giác ABC. Ở phía ngoài tam giác đó vẽ các tam giác vuông cân tại A là ABD và ACE a)Chứng minh CD = BE và CD vuông góc với BE b)BD^2+CE^2=BC^2+DE^2 c)Đường thẳng qua A vuông góc DE, cắt BC tại K. CM: K là trung điểm của BC

lập dàn ý cảnh đón giao thừa của gia đình em lưu ý là LẬP DÀN Ý

You drink too much coffee, that's why you can't sleep ->if you You press thí button to stop the machine ->if Make me some coffee,and i'll give you one of my biscuits ->if Working so much will make you tired ->if What would you do if you found some buried treasure -> if you were I might be late.If so,Start without me ->if i Susan felt sick because she ate 4 cream cakes ->if

Rewrite the following sentences (1.0 pt) The cat jumped through the window. → The boy saw………………………………………………………….. They allowed him to write a letter to his wife. → They let ……………………………………………………………….. She wants to play the piano. → She enjoys …………………………………………………………… After she had done homework she went to school. → Before………………………………………………………………….. Put the verbs into their correct form (1.0 pt) I expected (invite) ………………… to the party, but I wasn’t You must keep (practise) ………………… on computer It’s a pleasure (see) …………… you again after so long She was frightened of ……………….( rob) by a stranger. Read the text carefully and then choose the best option When I was a student, I had a summer job in an expensive restaurant in Glasgow. One day we were expecting forty members of a football team for lunch. I was given the job of peeling potatoes. I thought I was managing quite well with my small knife until the owner appeared to see how I was getting on. She was amazed that I was using a knife and asked why I wasn’t using the potato peeler. I had no idea what a potato peeler was so she let me into a small room behind the kitchen. There, on the table, was a small machine like the rubbish bins some people have in their bathrooms. She explained as if to a small child that I had to put the potatoes in, close the lid and press the button. When she came back ten minutes later, I told her I thought it was quicker to do it by hand. She asked what I meant. “Well, they aren’t ready yet,” I replied. You can imagine how I felt when she lifted the lid and took out the potatoes the size of peas. The potato peeler was not automatic. The story happened in ………….. winter B. a small restaurant C. summer D. a football club How did the owner of the restaurant explain how to use the potato peeler? very carelessly B. very angrily C. very impatiently D. very carefully The potato peeler ………….. was a rubbish bin B. could stop when the potatoes were ready was small D. was very difficult to use What can you infer from the story? Football teams often had lunch in this restaurant. The tables in this restaurant were only enough for forty guests. Some the potato peelers were automatic The student had no experience in working in a restaurant. Rosa and Luis are having a party, too. But it is not a …………(19)………. party. It is an anniversary party. Fifty years ago, Rosa and Luis got …………(20)………… Today their family and friends are giving them a party. Everyone ………(21)………. some cakes and says ” Happy Anniversary!” to Rosa and Luis. People also give cards and …………(22)………….. to the anniversary couple. A. birthday B. anniversary C. party D. wedding A. married B. influenced C. interested D. ready A. ate B. eats C. eating D. eat A. cards B. gifts C. parties D. cakes

Giúp mình với ạ 🥺🥺🥺 Cho tam giác ABC nhọn, về AH vuông góc BC tại H. Về về phía ngoài tam giác ABC là các tam giác vuông cân tại A là tam giác ABD và tam giác ACE. Vẽ DM vuông góc AH, EN vuông góc AH a, Chứng minh tam giác AHC = tam giác ENA, tam giác ADM = tam giác BAH

DỊCH HỘ TUI CHI TIẾT NHA,CẦN GẤP TRƯỚC 16'30.40 ĐIỂM ĐÓ Computers and the Internet have changed the way we communicate with other people. You can use the Internet to send e-mail messages for people to read. You can also use the Internet to send photos for people to see or music for them to hear. Today, the Internet uses only two of our senses: sight and hearing. But all that could change in the near future. Soon you may be able to send people hugs that they can feel! Scientists in Singapore discovered a way to send the sense of touch over the Internet. They hope the new technology will help parents keep in touch with their children. They think it will soon be possible for parents to hug their children using the Internet. James Teh is a scientist at Nanyang Technological University in Singapore. He has already figured out a way for people to "touch" their pets over the Internet. To do this, Teh invented a wireless "hug suit" for pets to wear. When people are far away from their pets, they can use a computer to control the hug suit. The suit gives the animal the feeling of being touched by its owner. Now, Teh plans to use the same technology to make a hug suit for children. A child wearing the hug suit will be able to get electronic bugs from his or her parents. Parents will use a computer to control the hug suit so the child feels like he or she is getting a hug. When parents put on a similar suit, they can be "hugged" back by their child. Teh works with Professor Adrian Cheok. Cheok said, "These days, parents go on a lot of business trips, but with children, hugging and touching are very important." He thinks the new technology will be useful for parents and children. He believes that many people will want to use this new technology. What do you think?

Tìm x và y x/5 =y/3 biết x mũ2 trừ y mũ 2=4 B. 2x=3y=5z và x+y-z=95

REWRITE: 1. I wish I had applied for that job. -> It is a job ......................... 2. People think that he buys me this new car on my 18th birthday. -> I ....................... 3. Sudden fires often cause serious damage. (happen) -> Fires ............... serious damage. 4. It was such hot news that I couldn't help announcing it to my classmates. -> So ................... 5. Ben was too exhausted to complete the marathon race. -> So................... 6. I could finish the work early because he helped me. -> Thanks ............... 7. I have little confidence that he will be able to do the job -> I have serious ........... 8. I don't think it's a good idea to invest all your money in the property market. -> Were ...................... 9. When are the council going to do something about the city's traffic problem? -> It's high time something ................................ (by) 10. I couldn't understand him because he spoke so quickly. -> Hadn't ............................. (have) 11. "Honestly, I've never met him before," she said -> She .............. him before. (denied) 12. He didn't run fast enough, did he? -> He ............. he? (too) 13. People believed that Peter told a lie. -> Peter ..................... 14. "Have you had enough for lunch?" the landlady asked us. -> The landlady asked ................... 15. Not many people attended the meeting last week. -> Only a .............. 16. It was very kind of you to help me. (grateful) -> I am ............................... 17. People did not discover AIDS until 1981. (not until) -> Not until ................. 18. She didn't agree with the idea. (favor) -> She ................ 19. I've lost interest in going to the same place all the time. (fed up) -> I'm ...................... 20. Fred tried hard to start the car, but without success.(matter) -> No matter how ......................

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