Tìm chu kì tuần T của hàm số Y=sin $\frac{3x}{2}$ + sin $\frac{5x}{x}$

cho 20 điểm câu này thì hơi pro rồi nhe=))) giúp tui cái BT này ik

Bài 1: 1. Visiting small villages in Moc Chau, tourists …… into the locals’ homes and …… with homemade corn wine. A. welcome - treat B. welcomed - treated C. are welcome - treated D. welcomed - are treated 2. Located only 187 kilometres from Ha Noi, Moc Chau ……………… by both private and public transport. A. can easily reach B. can reach easily C. can easily reached D. can be easily reached 3. Our parents …………..… to Moc Chau with us, so we went there on our own. A. were too busy that they went B. were too busy to go C. so busy that they went D. so busy to go 4. I was astonished that Da Nang ……… different from what I had seen 5 years earlier. A. be B. has been C. was D. had been 5. It ………………… to support the victims after the disaster. A. was kind of them B. was kind that they C. was kind of them that they D. was kind that them 6. The Prime Minister was pleased that the traffic problems of the city ………… A. be solved B. have been solved C. to have been solved D. had been solved 7. It is said that Ha Long Bay ………………… one of the most extraordinary natural wonders you have ever seen. A. be B. is C. was D. had been 8. My friends suggest ………………… by train to save money. A. go B. to go C. going D. we will go 9. Linda has lost her passport again. It’s the second time this ………………….. A. has happened B. happens C. happened D. had happened 10. I borrowed four books on gardening the last time I ……..…… to the library. A. go B. went C. had gone D. have gone Bài 2: 1. Before I started the car, all of the passengers ……………… their seat belts. A. will buckle B. had buckled C. buckle D. have buckled 2. No sooner ………………… the house than it started to rain. A. Laura had left B. had Laura left C. was Laura leaving D. Laura left 3. My feet are killing me! I wish I ………………… more comfortable shoes. A. had wore B. were wearing C. wore D. wear 4. The old man is said ………………… his memory. A. to have been lost B. to be lost C. to have lost D. to lose 5. I planned to visit my parents last week, but they suggested ………… the visit for a week because they hadn’t finished decorating the spare room. A. postponing B. to postpone C. to be postponed D. being postponed 6. My mother came from Baffin Island and she ……………… in an igloo. A. used to living B. used to live C. is used to live D. was used to live 7. I wish there ………………… no more family violence in the world. A. is B. were C. will be D. has been 8. Marriages ………………… by parents. A. used to arrange B. used to be arranged C. were used to arrange D. were used to be arranged 9. I wish I ………………… in an international summer camp in Brazil now. A. participate B. would participate C. were participating D. had participated 10. All the students were relieved ………………… the exams. A. that they pass B. that they would pass C. to have passed D. to be passed - nhanh nha-

Tìm Min: `B = x^2 + 2y^2 + 3z^2 - 2xy + 2xz - 2x - 2y - 8z + 2000`

Tìm tập xác định của hàm số lượng giác: 1. y=$\frac{2sinx+1}{cos²x}$ 2. y=$\frac{\sqrt[]{7-sinx}}{cos²x}$

MÌNH chia nhỏ câu hỏi đấy ạ!Mbg giúp toi nhes ^^

Vẽ đậu mầmthèm ăn hoặc đang ngủ trên app full màu và line nhoa 1 pic ko kí 1pic kí ạ thanks các pác nhìu vẽ có tâm hộ ạ

Bài 4 câu a vài câu B bài 3 ạ 2 câu thôi nhanh hộ mình ạ

Một ca nô xuôi dòng từ A đến B rồi đi ngược về A. Vận tốc ca nô là 15 km/h. Vận tố nước là 3km/h, AB dài 24 km a, Tính thời gian chuyển động của ca nô b, tuy nhiên khi quay về A đi đc 7,2 km thì hỏng ca nô, sửa mất 24 phút. Muốn về A đúng dự định thì phải đi với vận tốc bao nhiêu?

Calli: "Con dở" (có trang trí, 1 pic không kí ; có tâm)