Tìm giá trị nhỏ nhất của D=x^4-6x^3+10x^2-6x+9

1.Tính tổng:$S=1+114+9747+...+100.57^{99}$ 2.So sánh $2$ luỹ thừa cấp 5 sau: $20^{25^{50^{75^{90^{95}}}}}$ và $19^{26^{49^{76^{91^{94}}}}}$

mọi người giúp em với đang gấp, chỉ lỗi sai và giải thích hộ em với ạ: câu 1: simon finds it hard for making friends with other children câu 2: whatever happened, i didn't want to lose friendship of Vera

Giải hộ phương trình này với 60đ cảm ơn

x,y,z là các số thực dương thoả mãn xyz=1 Chứng minh rằng1/x+y+z +1/3 =2/xy+yz+zx

Giúp mình với ạ.....mai nộp bài rùi Thank you trước

Từ nội dung của đoạn trích ở phần I.ĐỌC HIỂU hãy viết 01 đoạn văn (khoảng 200 chữ) nêu suy nghĩ về một kĩ năng mà anh/chị cho rằng trường đại học hoặc trường đào tạo nghề nhất thiết phải đào tạo cho sinh viên để đáp ứng yêu cầu của cuộc cách mạng công nghiệp 4.0.

Bài 1: huyện A chồng được 157630 cây lấy gỗ huyện B trồng được ít hơn huyện A là 2917 cây Hỏi cả hai huyện trồng được bao nhiêu cây lấy Gỗ

A, B, C or D 1. This residential area used........a huge landfill A. being B. been C. was D. to be 2. It was......of him to show up at the meeting in jeans A. certain B. annoyed C. useful D. unprofessional 3. She is astonished......the puppet has grown so much in 2 months A. when B. if C.that D. for 4. It that five people had been injured in the car crash A. Reported B. has reported C. was reported D. reports 5. Eating from.................is a popular habit of people in big cities in VN A. street vendors B. libraries C. canteens D. shops 6. It is considered good behaviours to give away to..............people in a bus or train A. senior B. young C. depressed D. impolite 7. Like a local, you should take an afternoon.......ride through the bustling streets of HN's old quarter A. architectural B. geological C. complex D. rickshaw 8. Hai Van.................is 2,8 km long A. elevated walkway B. flyover C. underpass D. tunnel 9. The children in my home village used to go................., even in winter. Now they all have shoes A. on foot B. bare-footed C. playing around D. by bike 10. The Imperial Citadel of Thang Long is a............... that cinsists of royal palaces and monuments A. setting B. complex C. structure D. measure 11. She suggests......................to protect the environment A. recycling B. recycle C. recycled D. to recycle 12. I would suggest that you...........your doctor about this A. said B. says C. should say D. to say 13. Hue's most outstanding attractions are the emperors'..................... A. tombs B. graves C. caverns D. cathedrals 14. Our environment has been...........polluted A. gradual B. gradually C. gradualism D. gradualness 15. She lived in a(n).............family, so she didn't have much privacy A. rich B. poor C. nuclear D. extended 20. The hotel is beautifully...in a quiet spot near the river A. landed B. lied C. stood D. dituated

Give the correct form of the verbs in brackets: used to + V or simple past. 1. I (see) .................. Marcus at the library working hard. He told me to say hello to you. 2. She (be) ....................... a lot happier, but then she lost her job. 3. There (be) ....................... three restaurants in this town, but two closed down leaving only one. 4. If you look over there, you can see the field where they (fight) ....................... the Battle of Harris Hill in 1509. 5. Did you (take) ....................... a lot of photos when you were in Moscow last year? 6. How many hours a day did you (go) ....................... to school when you were ten? 7. Children never (talk) ....................... so aggressively to their parents. It’s terrible! 8. Soldiers (build) ....................... this bridge near the end of the Second World War. 9. Your mother (have) ............................... a Yorkshire Terrier when she was a young girl, didn’t she? 10. When I was five, I (be) ....................... able to do incredible gymnastics. Now I can’t even touch my toes.