1. Cho đoạn thẳng AB và (C) tâm O, bán kính r nằm về 1 phía của đường thẳng AB. Lấy điểm M trên (C) rồi dựng hình bình hành ABMM'.Tìm tập hợp các điểm M' khi M di động trên (C).

Bài 3 : Chứng minh rằng chữ số tận cùng của hai tổng sau giống nhau : U = 2^1 + 3^5 + 4^9 + … + 2005^8013 V = 2^3 + 3^7 + 4^11 + … + 2005^8015

29. This is so we can respond....to the needs of our clients. A. Officially B. Effectively 30. We can't do ......we want within a team. A. Anything B. Everything 31. Jen levies a .......charge for each booking. A. Transition B. Transaction 32. He has the irritating.....of smoking during meals. A. Custom B. Habit 33. This system used to......a great deal of food wastage. A. Result of B. Result in 34. Do you have any questions.....to presentation. A. Relating B. Involving

Cho x ∈(0, π/2) .So sánh : a, cos(sinx) với sin(cosx) b, cos(cosx) với sin(sinx)

Tìm lỗi sai và sửa lỗi: 1. Today the number of people who enjoy winter sports are almost double that of twenty years ago. 2. He couldn't find the dictionary because it was packing in the case ready for sending. 3. The athlete really surprised to hear that he had won the race after all . 4. He sounded his horn sudden when he saw the really old man step carelessly off the sidewalk. 5. Your friends became very angrily over a seemingly little problem. 6. The coal is the world's most abundant fossil fuel . 7. A traveller can reach some of the village along the Amazon only by riverboat 8. A person can actually do any job unless they get the right qualifications for it and work hard at it. 9. Caffeine in coffee is relative harmless if people drink it moderately. 10. So far Linda has written 5 novels on the problems teenagers having to cope with in the new world.

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. Tìm n  Z để; a) 4n – 5: n b) 2n – 1 là ước của 3n + 2.

Giúp mk câu này vs ai mk đánh giá 5* ạ

Giúp em câu 1và câu 4 với ạ,e cần gấp ạ

Giúp em với ạ 5 sao uy tín luôn ạ