Tính giá trị biểu thức bằng cách thuận tiện: 1): (1-1/4) x (1-1/9) x (1-1/16) x (1-1/25) x ... x (1-1/81) x (1-1/160) 2): (1+1/3) x (1x1/8) x (1+1/13) x ... x(1x1/80) x (1+1/99) 3): B= 2/3 + 2/15 + 2/35 + 2/63 + 2/99 Các bạn giúp mình với. Mình cảm ơn nhiều

Viết PTHH của các p ứ xảy ra nếu có khi cho Zn vào Hcll Na vào CuSO4 Hno33 vàoFeCus NaHF vào CaOh2

Điền đúng dạng của các từ trong ngoặc

Bài 2. Cho AMNP vuông tại M có đưong cao MH. Biết NH = 9cm, PH = 25cm. Tính bán kính đưong tròn ngoại tiếp AMNP, AMNH, AMPH? giúp mình vs nha mng ạ ( hứa vote 5* + ctlhn ) vẽ hình nếu có thể nha thx mng

giúp mình vs ạ giải thích tại sao làm vậy nha phần sự hòa hợp giữa chủ ngữ và động từ 1. Tom with dog_____ here now. a. is b. are c. was d. were 2. Tom as well as his dog_____ here now. a. is b. are c. was d. were 3. My old friends and colleague, John, _____ married. a. has just got b. have just got c. just has got d. just have got 4. The singer and actor_____ coming now. a. was b. were c. is d. are 5. The singer and the actor_____ coming now. a. was b. were c. is d. are 6. Mathematics_____ difficult. a. is b. are c. is d. are 7. Two billion dollars_____ not enough for the victims of the tsunami a. was b. were c. is d. are 8. Three years in a strange land _____ like a long time for lonely people. a. is seeming b. are seeing c. seems d. seemed 9. The film "Titanic"_____ very interesting. a. is b. are c. was d. were 10. Cattle______ allowed graze here now. a. was b. were c. is d. are 11. None of this money______ right now. a. is b. are c. was d. were 12. None of them______ right now. a. is b. are c. was d. were 13. Every student ______ willing to join the picnic now. a. is b. are c. was d. were 14. The number of students______ in creasing now. a. are b. was c. were d. is 15. A number of students ______ playing table - tennis now. a. are b. was c. were d. is 16. Physics______ my favourite subject. a. are b. is c. was d. have been 17. They boy, with his two companions, ______ the cherry tree now. a. has split b. have split c. is slitting d. are splitting 18. The write and poet______ going to preside over this meeting a. are b. is c. have been going d. is to 19. Neither the mother nor the children______ aware of the danger. a. were b. was c. is d. has been 20. She told me that she ______ happy for what he______ a. is feeling/ did b. was feeling/ had done c. feels/ did d. has felt/ has been going

Mấy bạn giỏi văn ơi giúp mình với ạ 😭😭 _Mong ko trùng với trên mạng a_

Cho biểu thức : P= -( x + 5) mũ 2 -/x-y+1/ + 2018. Hãy tìm giá trị lớn nhất (P)

Giải giúp mik với mình đang cần gấp

tại sao chúng ta phải tiêm vắc xin phòng chống covid 19

Làm giúp mình vs giải thích nx nhé