Giải cụ thể giúp mình với các bạn ơi

xác định m để đths y=x^3-3m^2x-2m và trục hoành có đúng 2 điểm chung

Hcn abcd có diện tích =30 và m(1;4) n(-4;-1) lần lượt nằm trêb 2 đt ab và ad . Ac :7x+4y-13=0. A. Tìm a B. Pt ab ad C. Tìm b d D. Tìm c

giúp mik với mấy bạn giỏi toán ơi Tính giá trị của biểu thức: A=202($200^{-2}$-1)($199^{-2}$-1)($198^{-2}$-1)...($101^{-2}$-1)

thêm dung dịch chứa 16,8g NaOH vào dung dịch chứa 28,84 g dung dịch Fe2(SO4)3 và Al2(SO4)3 thì được kết tủa X và dung dich Y. a) Nung nóng kết tủa X thu được bao nhiêu gam hỗn hợp chất rắn b) Dùng nước lọc được pha loãng thành 500 mL dung dịch thu được sau phản ứng

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Bài 1: Cho hình thang cân ABCD (AB//CD;AB⊥CD).Vẽ E đối xứng A qua CD, F đối xứng A qua trung điểm M của CD. Chứng minh A,B,C,D,E,F cùng thuộc một đường tròn. Bài 2 : Cho hình thoi ABCD , 2 đường chéo cắt nhau tại O. Trên AB,BC lấy các điểm E,F sao cho BE=BF. OE cắt CD tại G, OF cắt AB tại H. Chứng minh E,F,G,H cùng thuộc 1 đường tròn Giúp mình với ạ

CouchSurfing – a different kind of travel experience by Emma Jackson I love travelling abroad, but two years ago I didn’t have much cash to spend on my holiday. At first, I was planning to go camping again, but then a friend suggested an alternative: CouchSurfing. I had no idea what that was, so she explained. ‘CouchSurfers’ are people who stay as guests in other people’s homes for free, and visit the sights in the local area. You can do the things that most tourists do, like sunbathing on the beach or sightseeing in the town centre. Or your host could give you a language lesson, teach you how to cook local delicacies, or take you to places that visitors never find. It sounded much more fun than my other holidays, so I joined the website and sent emails to about twenty hosts in France and Spain right away. A few days later, I already had ten replies. After a week or two of emails, I made arrangements with four hosts in three different cities. I’m quite talkative and they seemed very friendly, so I wasn’t concerned about spending time with strangers. Two weeks later, I was arriving in Paris, and meeting my first host, Claudette. Over the next ten days, I stayed in four very different homes, improved my foreign languages, and made some great new friends. Sometimes the places where I stayed were basic – a sofa to sleep on, or even just a floor, but sometimes they were luxurious – much nicer than the hostels that I usually go to. I think it was probably the cheapest and most interesting holiday I’ve ever had! I’ve done CouchSurfing again twice since then: in Italy, and here in the UK. I’ll definitely do it again. In fact, I’m going on a trip to South America next year. And I’ve had five visitors at my place, including Claudette. I’ve discovered that hosting is as much fun as exploring a new place. CouchSurfing is a fantastic experience. Try it some time! Example: Emma started CouchSurfing because she wanted to save money. A True ✔ B False C Not given 1 It was her first holiday in another country. A True B False C Not given 2 Emma’s friend was a regular couch surfer. A True B False C Not given 3 ‘CouchSurfers’ can spend time with the homeowners. A True B False C Not given 4 Half of the people who Emma emailed didn’t reply. A True B False C Not given 5 Two of the people she visited lived in the same city. A True B False C Not given 6 Emma went on holiday about a month after joining the website. A True B False C Not given 7 Emma is quite shy. A True B False C Not given 8 Emma had a nice bed to sleep in at all the places where she stayed. A True B False C Not given 9 Emma has now had three Couch Surfing holidays. A True B False C Not given 10 Claudette was Emma’s favourite host. A True B False C Not given

Bạn cảm nhận như thế nào về sức sống của Truyện Kiều trong dòng chảy văn hóa, văn học dân tộc? Theo bạn, chúng ta cần phải làm gì để giữ gìn và phát huy giá trị của Truyện Kiều của Nguyễn Du trong tình hình hiện nay ? (( không coppy ))

viet doan van khoangăâ cau ke ve so phan cua lao hac