`a)`
`52^3`
`=(50+2)^3`
`=50^3+3.50^2 . 2+3.50.2^2+2^3`
`=125000+15000+600+8`
`=1410608`
`b)`
`499^3`
`=(500-1)^3`
`=500^3-3.500^2 . 1+3.500.1^2-1^3`
`=125000000-750000+1500-1`
`=124251499`
`c)`
`48^3+6.48^2+12.48+8`
`=48^3+3.48^2 . 2+3.48^2 . 2^2+2^3`
`=(48+2)^3`
`=50^3`
`=125000`
`d)`
`12^3-6.12^2 +144-9`
`=(12^3-3.12^2 .2+3.12.2^2-2^3)-1`
`=(12-2)^3-1^3`
`=10^3-1^3`
`=(10-1)(10^2+10+1)`
`=9.111`
`=999`
`a) 52^3= (50+2)^3= 50^3+3.50^2+3.50.2^2+2^3= 140608`
`b) 499^3= (500-1)^3= 124251499`
`c) 48^3+6.48^2+12.48+9`
`= 48^3+3.2.48^2+3.2^2.48+8+1`
`= 48^3+3.2.48^2+3.2^2.48+2^3+1^3`
`= (48+2)^3+1`
`= 50^3+1= 125001`
`d) 12^3-6.12^2+144-9`
`= (12^3-3.12^2+3.12.2^2-2^3)-1`
`= (12-2)^3-1^3`
`= 10^3-1^3`
`= (10-1)(10^2+10+1)`
`= 9.111= 999`
Cali : Summer self - study NL: Tự nhiên cuộc thi vẽ linh vật lần 2 biến mất 😨😨😨
6. I haven't been to a concert for over a year. The last time I was concert was over a year 47. The last time I really enjoyed myself was your birthday party. I haven’t really enjoyed myself since your birthday party 48. It's nearly 20 years since my father saw his brother. My father hasn’t seen his brother since nearly 20 years 49. When did you learn to drive? How long is it since you learned to drive? 50. The last time I went swimming was when we were in Spain. I haven’t I went swimming was since we were in spain 51. You haven't tidied this room for weeks. It’s haven’t tided this room for weeks 52. We started looking for a flat 2 months ago and we are still looking. We have looked for a flat 2 months and we are still looking 53. This is the first time I've been to a night club I haven’t been to a night club before 54. They have never heard such a thing before. This is the first time they heard such a thing 55. Noone has challenged his authority before. This is the first time 56. She left university 2 years ago It is university she left 2 years sgo 57. My mother was the most warm-hearted person I've ever known. I have never know a more warm-hearter preson than my mother 58. I haven't been able to see them for over a year. It is over a year I haven’t able to see them 59. It stared to rain at 2 o'clock. It has start to rain at 2 o’clock 60. I have never been to the ballet before. It is the fist time I been to the tablet 61. John and Mary moved to Edinburgh twenty years ago. It is twenty years ago since John and Mary moved to Edinburgh 62. The police started looking for him two months ago. For two months now the police looked for him 63. I have never seen a dirtier-looking dog. This is a dirtiest dog I seen 64. Mary rang hours and hours ago. It is hours for since she rang 65. It is ages since Alan visited his parents. Alan visited his parents ages and ages 66. John has not had his hair cut for over six months. It is 6months since he had his hair cut 67. I has never seen such a beautiful building. It's the most beutyful building I ever seen 68. I have never read such a romantic story. This is the most romantic story I ever read 69. They had never had such a cold winter. It was the colder winter they ever had 70. You will never meet anyone more dangerous than Mrs Jones. Mr. Jones is the most danerous person I ever meet 71. Man has never had such efficient servants as computer. Computer is the most efficient servants as computer the man had 72. I haven't played football since 2000. The last time I played football was 2000 73. I haven't been to HCM city for 2 years. The last time I went to HCM city was 2 year 74. I 've never met such a famous person before. It is the first time I saw a famous person 75. She hasn't seen that boy here before. It is the first time she saw that boy 76. She hasn't written to us since last year. The last time she wrote to us was last year 77. She started to learn E 8 years ago. It’s 8 years since she learned english 78. He hasn't laughed so much for ages. It’s he hasn’t laughted so much for ages 79. I haven't enjoyed myself so much for years. It’s haven’t so much for year enjoyed myself 80. The telephone rang for hours. It’s hours for since the telephone rang 81. I haven't seen him for ages. It’s I haven’t seen him for ages 82. I have learned English for four years. I started learing english four year ago 83. Ly’s father started to stop smoking last year. Ly’s father starting to stop smoking last year 84. The editor hasn’t written to Mai for a month. The editor last written to mai for a month 85. How long have you learned spanish? How long ago it is since you learned spanish? The end check ho e may bai nay voi a sai thif suar laij zum e ak trc 7 h toi nha :3
lm hộ mik bài, please!!!!!!!!!!
Giúp mình bài với ạ Xin cảm ơn ♥️
Bài tập viết lại câu thì hiện tại hoàn thành và quá khứ đơn 1. Samuel started keeping a diary in 1997. Samuel has keep a diary since 1997 2. We started leaming English fìve years ago. We have learned English for five year 3. I began living in Ho Chi Minh City when I was 8. I have lived in Ho Chi Minh city since I was 8 4. She has taught the children in this remote village for five months. She started teaching the childrent in this remote village five months 5. He has written to me since April. The last time he wrote to me was in April 6. She hasn’t had a swim for five years. She last time she swam was in five years 7. They last talked to each other two months ago. They haven’t talked to each other since two months 8. The last time she saw her elder sister was in 1999. She hasn’t seen her elder sister since 1999 9. She hasn’t written to me for years. It’s years she hasn’t wrote to me 10. Robert and Catherine have been married for ten ỵears. It’s ten years Robert and Catherine had been married 11. It’s two weeks since they deaned their room. They haven’t deaned their room for two week 12. It’s over six months since John had his hair cut. John has his hair cut was in over six months 13. How long is it since you rode a bicyde? When did you last ride a bicyde? 14. How long is it since he wrote to ỵou? When did he last write to you? 15. When did he last talk to you? How long is it since he talked to you? 16. When did you last telephone him? Hong long is it since you telephone him? 17. We have never eaten this kind of food before. It’s the first time we have eaten this kind 18. This is the fìrst time I have seen this film. I have never seen this film before 19. This is the first time he went abroad. He hasn’t went aboard before 20. She started driving 1 month ago. She has drivent since 1 month ago 21. We began eating when it started to rain. We have eatent since it started to rain 22. I last had my hair cut when I left her. I haven’t hair cut since I left her 23. The last time she kissed me was 5 months ago. She hasn’t kissed me for 5 month 24. It is a long time since we last met. We haven’t met for a long time 25. When did you have it ? How long it is you have it ? 26. This is the first time I had such a delicious meal . I haven’t such a diliciuous meal before 27. I haven’t seen him for 8 days. The last time i saw him was 8 days 28. I haven’t taken a bath since Monday. It is I haven’t a bath since Monday 29. It's 2 years since I had a punture. I have a punture since 2 years 30. It's 2 months since he earned any money. He has earned many since 2 months 31. He last shaved the day before yesterday. He hasn’t shaved since befor yesterday 32. I last drank champagne at my brother's wedding. I haven’t drunk champage since brother’s wedding 33. It's 2 years since I was last in Rome. I haven’t been Rome fore 2 year 34. I saw Tom last on his wedding day. I haven’t seen tom since his wedding day 35. I last ate raw fish when I was in Japan. I haven’t eaten raw fish since I been in japan 36. It's years since Mary last spoke French. Mary hasn’t spoken french since years 37. It's ten weeks since since I last had a good night sleep. I haven’t had a good night sleep since ten weeks 38. He last paid taxes in 1970. He hasn’t paid taxes since 1970 39. I last ate meat 5 years ago. I haven’t aeten meat for 5 years 40. It's 3 months since since the windows were cleaned. The windows haven’t cleaned since 3 months 41. It's years since I took photographs. I haven’t tooken photographt since years 42. I last watched TV on new years's day. I haven’t watched TV since new year’s day It's 3 months since he wrote to me. He hasn’t wroten to me since 3 months 43. The last time I was aboard was in the summer of 1978. I haven’t been aboard since in the summer of 1978 44. It's ten years since that house was lived in. That house was lived in since ten years 45. I haven't seen him for 2 months. I last saw him was 2 months check cho em tat ca cac bai tren voi a trc 7 h toi nhe sai thi sua lai o phan tra loi ho e aj
Làm giúp mình câh c,d, theo dạng áp dụng tính chất dãy tỉ số bằng nhau nhé! Mình sẽ vote và cảm ơn cho mn nha🙂.
Tìm GTLN,GTNN của hàm số: 1) y= 3sin^2(2x)-4 2) y= 1- sinx.cosx
Câu 1: Nguyên nhân dẫn đến chiến tranh thế giới thứ hai là gì? Hãy bày tỏ thái độ của em trước hậu quả ghê gớm của chiến tranh? Câu 2: Nguyên nhân thất bại của phong trào Cần Vương (1885-1896)?
cho hình thang cân MNPQ(MN//PQ) có góc P=góc Q=120 độ, MN=9cm,MQ=NP=4cm.Tính độ dài đáy PQ và diện tích hình thang cân MNPQ giúp mk với ạ,nếu cần ib mk mk tăng điểm chỉ cần mấy bạn giúp mk là đc ạ
Cho tam giác ABC, có đường trung tuyến BD, CE. Gọi M là điểm bất kì thuộc cạnh BC. Vẽ MG song song BD (G thuộc AC), vẽ MH song song CE (H thuộc AB) 1. Chứng minh BD và CE chia HG thành ba phần bằng nhau. 2. Chứng minh OM đi qua trung điểm HG (O là trọng tâm tam giác ABC).
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến
