a. cho n thuộc N. chứng minh rằng n mũ 3 chia hết cho 3 hoặc n mũ 2 chia 3 dư 1 b. chứng minh rằng ko tồn tại n thuộc N để n mũ 3 + 1= 300...0 BÂY GIỜ MK ĐANG CẦN GẤP NHANH LÀM ĐÚNG MK VOTE 5 SAO CHO NHA XIN CẢM ƠN MN TRƯỚC NHA

cho tam giác ABC vuông tại A (AB>AC). gọi M là trung điểm của BC .trên tia đối của tia MA lấy điểm D sao cho MD=MA a, Cho AB = 8cm, BC = 10cm . Tính AC b, CM : ∆AMB = ∆DMC ,từ đó suy ra CD ⊥ AC c, Vẽ AH ⊥ với BC tại H , trên tia đối của HA lấy E sao cho HE = HA . CM : ∆ACE cân d, CM : BD = CE ( Vẽ hình giúp mình luôn nhé . Mình cảm ơn)

Bài 8. Quãng đường từ A đến B dài 1500m. Hằng ngày bạn Minh đi bằng xe đạp từ A đén B với vận tốc trung bình là 6km/h. Hỏi Minh xuất phát từ A trễ nhất là lúc mấy giờ để đến B không trễ hơn 15g30p

cho hinh tam giac ABC co dien tich=180cm2. Keo dai day BC ve phia C lay diem D sao cho CD = 50 phan tram BC.Tinh dien tich tam giac ABD

.Rewrite the sentences as directed to that the meaning stay the same 1.Is there a colorful picture in your room? -Has___________________ 2.How much is a bowl of noodles? -How much does_______________ 3.Let's go out for a walk -Why_____________ 4. I like beef best -Beef______________ 5.That pencil belongs to Hoa -Hoa is ___________ 6. What is the age of this building? -How________________ 7.The Mekong river is longer than the Red river -The Red river_______________ 8. I spend two hours a day doing my homework -It____________________ 9.No one in my class is as beautiful as Hoa -Hoa________________ 10. How heavy is that big bag? -How much____________

Giải hộ mk bài này vs ạ MỌI NGƯỜI ƠI!

Mrs.Nga speaks English. . (Fluent)

125 nhân âm 23 cộng 23 nhân 225 23

Bài 1;2 nên vay giúp mị với mọi người ơi

IV. Fill in each gap with a suitable preposition. 1. Zoology is more closely related........biology than it is to botany. 2. Are you interested..........working with them? 3. I certainly hope that David is aware..........all the problems involved. 4. Mr. Anderson is responsible...........hiring and firing employees. 5. Fred is capable...........doing better work than he's doing at the present. 6. Tom was proud...........his good marks on the English exam. 7. After next week, I'll be free...........all my worries. 8. That fashion magazine is full...........advertising for women's clothes. 9. The clothes like these aren't very suitable...........that kind of job. 10. My friend and I were very happy...........the result of the election. V. Fill in each gap with only ONE suitable word. 1. He was wonderful in his role and gave an excellent......... 2. I think we're going to have to walk..........the jungle. 3. She doesn't treat me like a friend. Her behaviour towards me is so......... 4. He is the very man we often talk....... 5. I will try to work as hard as I........ 6. What to begin...........? 7. My hair is long, so I had to have it........ 8. Please believe me, I never tell a......... 9. What's the weather.........there? 10. People...........to ride on horseback but now they use cars. 11. The tunnel under the English Channel would be the.........one in the world - 36 miles. 12 The earth on.............we live is constantly moving.