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Cho a, b, c là các số thực thỏa mãn ab + bc + ca = abc và a + b + c = 1. Chứng minh rằng: (a - 1).(b - 1).(c - 1) = 0

rút gọn 360/640= 2310/3850= 1313/4747=

Its spacy? dịch hộ em câu này với ạ =((

Mk có đáp án r mà ko biết cách giải Mn giúp mk giải chi tiết với ạ Chân thành cảm ơn

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1. When I last saw him, he _____ in London. A. has lived B. is living C. was living D. has been living 2. We _______ Dorothy since last Saturday. A. don't see B. haven't seen C. didn't see D. hadn't seen 3. The train ______ half an hour ago. A. has been leaving B. left C. has left D. had left 4. Jack ______ the door. A. has just painted B. paint C. will have painted D. painting 5. My sister ________ for you since yesterday. A. is looking B. was looking C. has been looking D. looked

Cho tam giác abc cân tại a góc b = 65 độ đường cao ch = 3,6 hãy giải tam giác abc

Nêu sự liên kết của tất cả các hệ cơ quan trên cơ thể khi chạy bộ

1. “ Listen carefully!”, he said to us. => He told 2. “ Don’t wait for me if I’m late”, Ann said to him => Ann told 3. “ Eat more fruid and vegetables”, the doctor said to her. => The doctor advised 4. “ Shut the door but don’t lock it”, she said to us => She told 5. Ann said “ I’m tired today.” => Ann said that 6. Tom said “ New York is bigger than London.” => Tom said that 7. Bill said to me: “ where will you go tomorrow?” => Bill asked me 8. Mary said to me “ When did you pick Ann up yesterday?” => Mary asked me 9. Ann said, “ What do you call a person who makes and repairs things of iron, Jane?” => Ann asked 10. “ The clock will never work again if you try to repair it”, the man said. => The man said that 11. “ Did you phone me yesterday?”, Tom asked Mary => Tom asked Mary 12. She asked him, “ Have you read this book?” => She asked him 13.” Do you know how far the swimming fool is?” I asked Mary => I asked Mary 14. They asked us, “ May we smoke here in this room?” => They asked us