Cho tam giác nhọn ABC (AB < AC) có D, E lần lượt là trung điểm của BC, CA. Trên tia đối của tia ED, lấy điểm M sao cho ED = 1/2 EM. a) Chứng minh DE//AB và AMEB là hình thang có hai đáy bằng nhau. b) Gọi N là trung điểm của ME, K là giao điểm của BE và MC, I là giao điểm ca AC và BM. Chng minh IK là đường trung bình ca tam giác MBC. Từ đó chứng minh AN = IK. c) Gọi H là giao điểm của BN và AC. Chứng minh rằng AB, NC và HD đồng quy

Exercise 4: Choose the correct answer. 1. John: Wow, it's freezing out there. Jane: I __________ some coffee to warm us up. Do you want a piece of pie as well? John: Coffee sounds great! But I __________ dinner with some friends later, so I'd better skip the pie Jane: I __________ to dinner tonight too, but I'm having a piece of pie anyway. A. will make – am going to have – am going B. will make – will have – will go C. am making - will have - will go D. am making - am having - am going 2. I __________ there at four o'clock, I promise. A. am going to be B. will be C. am being D. am 3. He __________ the car if he doesn’t have enough money to build a new house. A. will sell B. is selling C. is going to sell D. sells 4. I love London. I __________ there next year. A. am probably going B. am probably going to go C. will probably go D. probably go 5. A: “I __________ to the party, would you like a lift?” - B: “Okay, I __________ the bus, I'll come with you.” A. am going to drive / am not taking B. will drive / won’t take C. am driving / am not going to take D. am driving / won’t take 6. What time __________ ? A. will the sun normally set B. is the sun normally setting C. is the sun normally going to set D. does the sun normally set 7. The students __________ the bus to school every morning. A. will take B. take C. are taking D. are going to take 8. I wonder if Ann knows that the time of the meeting has been changed. – Probably not. I __________ tell her on my way home. I’m glad you thought of it. A. tell B. am telling C. am going to tell D. will tell 9. I _______ return the book after I read it. A. will B. am C. not D. going to 10. A: This letter is in French, and I don't know French. Can you help me? B: Sure, I ___________ it for you. A. am going to translate B. won't translate C. will translate D. am translate 11. The next term ___________ on 16th September. A. begin B. begins C. will begin D. has begun 12. Dad can't take you to school. He __________ an appointment at the dentist's at 8.30. A. going to have B. will have C. is having D. has 13. The library __________ at 8.30 and __________ at 7.30. A. open – close B. is opening - is closing C. will open - will close D. opens – closes 14. So, are you coming along, after all? - Well, I don't know. What time __________ ? A. you're leaving B. will you be leaving C. will you leave D. do you leave 15. "Do you know it's Maggie's birthday today?" - "Yes, she __________ a party tonight." A. has B. is to have C. is having D. will have

giải pt √x - 1 / √ x+ 1 = 2 chú ý là căn nó không phải là nguyên x mà cả x - 1 và bên kia cũng thế

Exercise 2: Circle the correct answer. 1. He will get married/is going to get married next year 2. I will send/am sending Alex your letter when I see her tomorrow. 3. What terrible traffic! Just look at the long queue. We will miss/are going to miss our flight. 4. I hope you will visit/are going to visit my new house in Charlington some time. 5. In the future, many young people will start up/are going to start up their own businesses. 6. The sky is blue. It will be/is going to be another hot day. 7. A: What are your plans for the holiday? - B: I will visit/am visiting my grandparents and then going trekking in Sapa. 8. A: I can't fix the problem in my computer, Jason. - B: Alright. I will take/am going to take a look at it. 9. I will take/am taking you out for ice-cream as long as you get an A+ on your Math test. 10. A: Do you want to have pork or beef? - B: I think we will have/we are having the beef, please. 11. 'I haven't got my phone.' 'That's OK. I will lend/ am going to lend you mine. 12. It's Julia's birthday next week, so we will buy/ are going to buy her some flowers. 13. Will you lend me £10? I promise I will give/ am going to give it back to you tomorrow. 14. We will have/ are going to have a barbecue tomorrow. It's all planned, so I hope it won't rain. 15. 'Jim's starting university tomorrow.' 'What will he/ is he going to study?

Phân tích đa thức thành nhân tử

Giúp mình với ạ mình đang cần gấp

Lm hộ mình câu a đc ko mình đánh giá 5 sao cho

X. Make questions for the underlined parts. 1. She needs twelve eggs to make two cakes. 2. They drank a lot of wine at the party last night. 3. I often drink coffee in the morning. 4. Beef noodle soup is my favourite food.

Exercise 3: Find and correct the error (if any). Put a (v) if the sentence is correct. 1. Are you planning any summer holiday? - I don't know yet. Perhaps I will stay at home. → ______________ 2. He is the worst tennis player of all. He is going to win. → ______________ 3. I haven't made up my mind yet. But I think I am going to find something nice in my mum's wardrobe. → ________ 4. Listen, I'm having a party this Saturday. Would you like to come? → ______________ 5. Our ferry will depart for Ibiza at 6 tomorrow morning. → ______________ 6. That glass is too near the edge. I think it is falling. → ______________ 7. The board of directors has reached the final decision. Harrison will lead the marketing team from next month. → ___ 8. We will wait in the shelter until the bus will come. → ______________

Mọi người làm giúp mik nha 1. Viết thành tích a. 27x^3 +8 b. 125 + 8y^3 p/s: ^3 là : mũ 3 VD: 2^3 : 2 mũ 3 mik sẽ cho CTLHN + 5* + cảm ơn nếu làm nhanh nhất đúng nhất và không chép mạng