Cố giúp em với ak ................

1, Tìm Min, Max A= $\frac{2 √x+1}{ √x+5}$ 2, Tìm x ∈ Z để A ∈ Z A= $\frac{2 √x-1}{3 √x+2}$

Giúp em ex2 với ạ nhanh lên em cần gấp

I. Choose A, B, C or D to indicate the correct answer to each of the following questions. 26. She was always hard-working at school. She spends most of ______ time studying. A. she B. her C. hers D. she’s 27. They have decided to clean up the neighborhood because ______ is full of rubbish. A. it B. they C. their D. its 28. My cousin, Hoa, is the same age as ______. A. I B. me C. mine D. myself 29. The villagers are as friendly as ______ were years ago. A. their B. they C. them D. their 30. My brother’s taste in art is quite different from______. A. me B. myself C. mine D. mines 31. Those dishes are for Hoa and ______. A. I B. me C. mine D. mines 32. They often wear ______ clothes. A. each others B. each others’ C. each other’s D. each other 33. Now she can look after ______. A. hers B. she C. her D. herself 34. People in that country often wear ______ traditional clothes on the New Year Day. A. them B. theirs C. their D. themselves 35. Her gloves have worn out, so she bought ______ a new pair of gloves. A. herself B. she’s C. hers D. she 36. Don’t worry about ______. A. I B. my C. myself D. me 37. The director ______ welcomed us to the hotel. A. him B. his C. himself D. he 38. She climbed out of the swimming pool and dried ______ with towel. A. hers B. herself C. she D. she’s 39. She had a wonderful holiday. She enjoyed ______. A. her B. hers C. she D. herself 40. I’m sorry, the golden ring is actually ______. A. mine B. me C. my D. mines 41. He broke ______ leg in the accident. A. him B. his C. he D. himself 42. She needs to change ______ mind immediately. A. she B. hers C. her D. herself 43. Linda decided to have ______ hair cut after three years. A. hers B. her C. she D. herself 44. I made this cake for ______. A. I B. myself C. my D. she 45. Her voice is better than ______. A. I B. my C. mine D. mines 46. In spite of ______ disability, he tried to become the winner of the competition. A. him B. he C. himself D. his 47. She studies better than ______. A. us B. our C. ours D. ourselves 48. Linda and ______ want to go to the movie. A. me B. I C. myself D. mine 49. My father cooked the soup for my brother and ______. A. me B. I C. mine D. mines 50. My sister invited ______ to the party. A. he B. him C. his D. himself

21. He asked me to go _____ find his wallet in the office. A. or B. so C. and D. if 22. I prepared all the possible questions for the interview this morning; _____, I failed it. A. but B. however C. for D. instead 23. Skating is a good sport for players to keep fit. _____, it helps us to better control balance. A. When B. Additionally C. So D. But 24. _____ I’m watching a documentary on TV, my sister is cycling around the village with her friends. A. While B. Especially C. However D. Until 25. After the death of his parents, he never smiles _____ laughs. A. as B. or C. instead D. however 26. _____ her arms still hurt, she decided to stop playing volleyball for a month. A. Additionally B. However C. And D. As 27. She would pass that judo contest _____ she practiced regularly. A. but B. so C. until D. if 28. We couldn’t play badminton in this weather condition. _____, we could stay inside and watch some musical programs on TV. A. Instead B. While C. Or D. For 29. I love Western culture, _____ the Christmas Eve. A. however B. if C. especially D. but 30. _____, we got home at midnight. A. For B. As C. Finally D. While 31. You should stay at home _____ the storm blows over. A. while B. additionally C. or D. until 32. _____ the teacher had gone, the students started to make noise and run around the class. A. If B. Immediately C. For D. However 33. _____, where do you think we should take the children to? A. So Vậy B. While C. Instead D. Until 34. There are people without homes, jobs _____ family. A. and B. or C. however D. for 35. We stopped _____ bought some food for lunch today. A. and B. if C. so D. but 36. I will try to wrap my gifts _____ asking for your help. A. finally B. instead of C. for D. while 37. _____, we decided to go to the pictures on Sunday morning. A. Because B. If C. While D. Finally 38. Tonight, my brother has to do the dishes _____ I made the bed for him this morning. A. so B. but C. instead D. as 39. Remember not to talk _____ you’re eating. A. or B. until C. while D. so 40. She will become more well-known _____ her latest film can get more viewers. A. instead B. while C. if D. and

Cho hỗn hợp X gồm Al2O3 , Fe2O3 , Cuo để hòa tan hoàn toàn 4,22 g hỗn hợp X cần vừa đủ 800ml dd HCl 0,2M . Lấy 0,08 mol hh X cho tác dụng với hiđro dư ở nhiệt độ cao thấy tạo ta 1,8g nước a,viết các pt hóa học xảy ra b,tính thành phần % về kim loại của mỗi axit có trong hh X

Hoán vị gen 1 bên, hoán vị gen 2 bên là ntn? Lấy ví dụ phép lai hoán vị gen 1 bên và phép lai hoán vị gen 2 bên

Viết calligraphy"Izukumidoriya297 " Tone màu gì nhìn xinh xinh tý Trang trí Pic kí pic ko

Help giúp mình gấp nha! Bài như hình dưới đây

LEVEL A1 I. Choose A, B, C or D to indicate the correct answer to each of the following questions. 1. My sister sometimes helps ______ to do the housework A. me B. mine C. my D. mines 2. A good daughter is ready to share things with ______ mother. A. she B. her C. hers D. she’s 3. I usually go out with ______ friends or family on Sundays. A. mine B. me C. mines D. my 4. Some of the students in my class go to the laboratory where ______ learn chemistry and physics. A. them B. it C. they D. its 5. Mai: What is ______ favorite subject? Lan: My favorite subject is Math. A. you B. your C. yours D. you’re 6. Miss Hoa teaches English in my class. She is ______ English teacher. A. we B. our C. us D. ours 7. ______ notebook is on the table. A. I B. My C. Me D. Mine 8. They told me they would come so let’s wait for ______. A. they B. them C. their D. themselves 9. What do ______ often do after school? A. your B. yourself C. you D. yours 10. A bad friend can lie to ______. A. your B. yourself C. you D. yours 11. Can you give ______ the pen? A. mine B. myself C. mines D. me 12. That’s ______ brother. A. my B. mine C. me D. mines 13. I like fish because ______ is delicious. A. it B. its C. itself D. it’s 14. Let’s collect and give warm clothes to poor children in ______ city. A. us B. our C. ours D. ourselves 15. My brother and ______ share a bedroom. A. me B. I C. my D. mine 16. Can you tell ______ how to cook the soup? A. mine B. myself C. my D. me 17. What is ______ nationality? A. he B. his C. him D. himself 18. What language does ______ speak? A. her B. hers C. herself D. she 19. My father is angry with ______. A. I B. mine C. me D. myself 20. I ______ want to be the tallest student in my class. A. me B. myself C. mine D. my 21. She looks at ______ in the mirror. A. she’s B. she C. herself D. hers 22. He can walk to school by ______. A. him B. his C. he D. himself 23. We must continue ______ journey although there are many troubles. A. our B. us C. we D. ours 24. Your sisters can take care of ______ when you are not at home. A. them B. their C. themselves D. they 25. You should live for______, not for your parents. A. yours B. yourself C. your D. you’re