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tìm x, biết: 1+2+3+.....+x=1176 em ko bt lm mong mn giúp đỡ, em cảm ơn

Cho ΔABC ⊥ A. Kẻ phân giác BI. Kẻ ID ⊥ BC. a) Chứng minh ΔABI= ΔDBI. b) Chứng minh ΔABD cân. c) Chứng minh BI là đường trung trực AD. d) Kéo dài DI cắt BA tại I. Chứng minh ID<IE, IC=IE.

M = x^2 – 2xy + y^2; N = y^2 + 2xy + x^2 + 1. Làm bẵng latex nhé

a)√(7+√2)=3+√5 b) √(x^2-6x+9)= √(4+2√3) tìm cả điều kiện

Câu 2 (1,5 điểm): Hòa tan Bao vào nước thu được dung dịch làm phenolphtalein chuyển thành màu hồng. Giải | thích và viết phương trình hóa học. Câu 3 (2,5 điểm): Chọn hóa chất thích hợp và viết phương trình hóa học để loại các khí SO2 và CO2 ra khỏi hỗn hợp với khí có.

Mong được mọi người giúp đỡ Exercise 4. Combine each pair of sentences into one sentence using Gerund 1. Alice made a mistake in her homework. She remembered it.  Alice remembered……………………………………………………………………………………… 2. Tom asked me to remind him to buy a new shirt. I forgot it.  I forgot ………………………………………………….……………………………………………… 3. Mr Pike taught John several years ago. He doesn’t remember it.  Mr Pike doesn’t remember……………………………………………………………………………… 4. This work must be done before we go home. We mustn’t forget.  We mustn’t forget……………………………………………………………………………………… 5. Peter lived in this city when he was a boy. He doesn’t remember it.  Peter doesn’t remember………………………………………………………………………………………… Exercise 5. Rewrite the following sentences using Gerund: 1. A good way of keeping fit is to swim everyday.  Swimming………………………………………………………………………………………… 2. It takes a long time to learn a foreign language.  We spend………………………………………………………………………………………… 3. It is not easy to change money here on a Sunday.  Changing………………………………………………………………………………………… 4. It is impossible to park your car during office hours.  Parking…………………………………………………………………………………………………… Correct mistakes 1. My parents made me to promise to write them once a week. ...................................... 2. I don’t mind to have a roommate. ...................................... 3. Most students want return home as soon as possible...................................... 4. When I went to shopping last Saturday, I saw a man to drive his car onto the sidewalk. ............... 5. I asked my roommate to let me to use his shoe polish. ...................................... 6. To learn about another country it is very interesting. ...................................... 7. I don’t enjoy to play card games. ...................................... 8. I had my friend to lend me his car. ...................................... 9. I tried very hard to don’t make any mistakes. ...................................... 10. Some people prefer to save their money to spend it. ...................................... 11. The task of find a person who could help us wasn’t difficult. ...................................... 12. All of us needed to went to the cashier’s window. ...................................... 13. I am looking forward to go to swim in the ocean. ...................................... 14. Please promise not telling anybody about my secret. ...................................... 15. Lillian deserves to be tell the truth about what happened last night. ...................................... 16. Barbara makes me laughing. She has a great sense of humor................................... Exercise 6. Rewrite the following sentences using the words in the blanket. 1. the police forced everyone to leave the building. The police made …………………………………………………………………………… 2. The driver allowed the old man to travel on the bus without a ticket. The driver let 3. Jack forced his younger brother to wash the dishes. Jack made 4. I don’t allow people to smoke in my house or in my car. I don’t let 5. A car ran down hill. Tom saw 6. Your sister wore your hat. I saw 7. Did Tam do something suspicious? Did you notice 8. Tom’s sister died of AIDS. I heard 9. Your sister shouted “Fire!” I heard her. I heard 10. Tom prepared the sandwiches. Diana watched him. Diana watch 11. Brian left early. Did you see him? Did you 12. A car came around the corner. Tom saw it. Tom saw 13. Something crawled up to my arm. I felt it. I felt 14. john painted the window. I watched him. I watched Exercise 7. Choose the best answer A, B, C or D: 1. The new students hope ……………in many of the school’s social activities. a. including b. being included c. to include d. to be included 2. Paul didn’t mind ……………….by his fortieth birthday party held by his friends. a. surprising b. being surprising c. to surprise d. to be surprised 3. I finally finished……………..at 7.00 p.m and served dinner. a. to cook b. to be cooked c. cooking d. being cooked 4. Although younger than the other children, she demanded………….….in the game. a. to include b. to be included c. including d. being including 5. The driver was so tired of ………... the same route every day that he asked for a transfer. a. to drive b. being driven c. driving d. drive 6. Ms Brown expects ………………..about any revisions to her story before it is printed. a. consulting b. being consulted c. to consult d. to be consulted

Các bn ơi làm hộ mik đề Văn vs đoạn văn ngắn về bài cảnh khuya

III. Write one word in each gap. 48. It was Lia’s first job as a model and she was quite anxious ……………………… it. 49. Bill seems ……………………… have had his hair done differently. 50. I couldn’t help staring ……………………… the man in the restaurant who was wearing a kilt. 51. Before starting my design, I referred ……………………… some books of past designs to give me inspiration. 52. Plenty ……………………… fashion designers have been successful in spite of not having any formal training in fashion. 53. I asked the shop assistant to advise me ……………………… my choice of shoe. 54. Many fashion journalists criticized the actress ……………………… arriving at the Oscars in a second-hand dress. 55. The supermodel insisted ……………………… having a star on her dressing room door. 56. These days, most designers use a computer ……………………… visualize their designs before they make any clothes. 57. Visiting fashion shows can be quite useful ……………………… picking up new ideas. IV. Write one word in each gap. DOES WHAT WE WEAR MATTER? In spite of there (58) ……………………..…….. some truth in the expression “Never judge a book by its cover”, which reminds us that appearances can be deceptive, there (59) ……………………..…….. to be far more truth in the expression “You never get a second chance to make a first impression”. There are plenty (60) ……………………..…….. examples of people who have insisted (61) ……………………..…….. expressing their individuality through their clothing and have suffered for it. If you are going to wear outrageous clothes, you’ve got to be prepared (62) ……………………..…….. the reaction of others. That reaction may not be positive. You may be stared (63) ……………………..…….., criticized (64) ……………………..…….. wearing something unusual, or even insulted. On the other hand, you may be complimented (65) ……………………..…….. your style. Location and situation are very important. At a job interview, for (66) ……………………..…….. you should probably be more anxious (67) ……………………..…….. please your potential employers than interested in showing off the latest fashions.