1, tìm tập xác định y=cos 2x/(x-1)

MN lm nhanh giúp em bài 5 với ạ

các bn giải hộ mình với ạ Mark the letter A, B, C, or D onyouranswersheet to indicate the wordthatwhosepronunciationisdifferentfrom the others in eachof the followingquestions

giúp với plsssssssssssssssssssssssssssssssssssssssssss

Phân tích đa thức thành nhân tử $(a^2+b^2+ab)^2-a^2b^2-b^2c^2-c^2a^2$

tính tổng sau bằng pascal 1*2*3*4*...*10

Vẽ mầm lo lắng, có màu, ko vẽ trên giấy tập ( ô ly , gạch ngang) NL: mn bt điểm chuẩn thi vào lớp 10 tphcm chưa, cho mk xin với :((

1. Mobile phones and computers are essential technological … for young generation. A. facility B. facilities C. facilitator D. facilitators 2. Poor children don’t have shoes to wearr, so they have to go … A. sandals B. foot C. bare-footed D. shoes 3. The parents are helping their children build … behind their house. A. event B. occasion C. igloos D. passing 4. The stories about the family’s ancestors are … on to next generations. A. pass B. to pass C. passing D. passed 5. They built a hospital here. There … a playground here. A. is B. used to C. used to be D. use to be 6. I hated ice-cream; I … eat ice-cream. A. used to B. didn’t use to C. use to D. wasn’t used to be 7. My gradparents … light their house with oil lamps. A. used to B. use to C. used to be D. is used to be 8. My friends are swimming right now. I can’t join them because I am ill. I wish … A. I were swimming with my friends now B. I was swimming with my friends now C. I swim with my friends now D. Both A & B are correct 9. My grandmother is 60 years old now. She wishes … A. she was young again B. she is young again C. she were old again D. she is old again 10. My computer has stopped working and I don’t know what to do. I wish … A. I knew how should I fix it B. I knew how to fix it C. I would know how to fix it D. I know how to fix it

làm nhanh giúp em với ạ! em cảm ơn ạ

Nung nóng hỗn hợp gồm 2,4g bột Fe và 1,6g lưu huỳnh trong ống kín a)Hỏi sau phản ứng chất nào còn dư và dư bao nhiêu gam b)Tính khối lượng FeS tạo thành sau phản ứng