Ai giúp e vs ạ Em sẽ vote 5 sao Em xin cảm ơn mn

lớp 7A có 52 học sinh được chia thành 3 tổ. nếu tổ 1 bớt đi 1 hs, tổ 2 bớt đi 2 hs, tổ 3 thêm 3 hs thì số hs tổ 1, 2, 3 tỉ lệ nghịch vs 3; 4; 2. Tìm số hs mỗi tổ

Giúp mình bài 2 ạ Xong mình vote 5 sao

Cho ps A= 75/5n-2 ( n thuộc N*) Tìm n để a. PS A là Số tự nhiên b. A rút gọn đuọc

. Phân tích nghịch lí đời thường mà tác giả khám phá và thể hiện trong những câu thơ: Anh làm nên cơ khí Làm nên thỏi vàng nhấp nhánh trên tay Phải rồi, mỗi tháng, mỗi giờ, mỗi phút, mỗi giây Đều có những hạt vàng chảy qua kẽ bàn tay Lẫn với trống không mà anh chẳng biết (Ngày trống không, trích từ Chế Lan Viên toàn tập, NXB Văn học, 2002) giúp e trl câu này vs ah ! càng nhanh càng tốt ạ e cảm ơn

Mọi người giúp mk bài 4 nhé!! Cảm ơn ạ

a Cho a+b+c = 0 C/m a mũ 3 + b mũ 3 + c mũ 3 = 3abc b Cho { a+b+c } mũ 3 = 3 { ab + bc + ca } C/m a=b=c

A= -x+2 a) Tìm x nguyên để A nguyên dương b) Tìm x để C>0

Giúp mik giải những câu khoanh tròn nha

. Choose the answer . 1. The city has recently set _____ a library in the West Suburb. A. up B. off C. out 2. The last exhibition was not ______ this one. A. as interesting B. more interesting than C. so interesting as 3. I don’t think Fred gets _____ with Daniel. They always argue. A. over B. through C. on 4. This city is developing ______ in the region. A. as fast as B. faster than C. the fastest 5. You should take your hat _____ in the cinema. A. in B. over C. off 6. You’re not a safe driver! You should drive ______. A. careful B. careless C. more carefully 7. Their children have all grown _____ and left home for the city to work. A. up B. out C. out of 8. I was disappointed as the film was ______ than I had expected. A. as entertaining B. less entertaining C. more entertaining 9. We were shown _____ the town by a volunteer student. A. up B. off C. around 10. Let’s take this road. It is ______ way to the city. A. the shortest B. a shorter C. A and B are correct 11. The town council decided to pull _____ the building, as it was unsafe. A. up B. over C. down 12. At weekends the city centre is always packed with people. A. busy B. crowded C. full 13. She lives in one of the most ______ parts of the city: there are lots of luxury shops there. A. fashionable B. historic C. comfortable 14. China is _____ far the most populated country in the world. A. as B. by C. so 15. Air pollution has a bad influence _____ the environment. A. at B. in C. on 16. Karachi in Pakistan is the _____ largest city in the world in population. A. most B. two C. second 17. Before ______ to the office, she has to take her children to school. A. go B. going C. to go 18. Hai Duong is famous _____ its green bean cakes. A. for B. of C. with 19. The prospect of doing _____ cheered her up considerably. A. something different B. different something C. differently something 20. We’ve spent a lot of time _____ around the town. A. wander B. wandering C. to wander