tìm số có ba chữ số.biết chữ số hàng trăm hơn chứ số hàng chục 1 đơn vị và bằng 1/2 chữ số hàng đơn vị

Cho tam giác ABC vuông tại A có C = 30°. BD là phân giác của góc B (D thuộc AC), E là trung điểm của BC. Chứng minh rằng: a) DA = DE b) AB = CE c) DB = DC d) DE là đường trung trực của đoạn BC e) BD là đường trung trực của đoạn AE Cac anh chi giup em voi a

Giải các phương trình sau: a)3x-/x-1/=0 b)/5-2x/- $\frac{2}{3}$x=1 c) $\frac{1}{2}$x+/3x-2/=1

Calli chữ Gia Đình Hạnh Phúc nha trên app nha Trang trí đẹp vào ó nha mn

Tìm m để hàm số sau đồng biến trên R: $mx^{3}$ - (2m-1)$x^{2}$ + 4m - 1

giup mk voi a!!! tuy nhieu nhung viet ra vo cx dc! 1. I’m sorry now that I can’t tell her about this.  Now I wish . . . . . . . . . . . . . . . . . . . . . . . . . 2. She won’t visit me again. I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3. I’m sorry that he isn’t with us now. I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4. I’m sorry that I can’t finish my homework .  I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5. What a pity! You have to leave now. I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6. John can’t join in the trip as he promised. I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7. My father can’t speak English fluently I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8. She is sorry that she doesn’t take part in cooking class.  She wishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9. I’m afraid that we don’t have enough money to buy that little house.  We wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10. Maria will not be able to join our trip tomorrow  I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11. What a pity Mary doesn’t understand me  I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . 12. I ‘m sorry . I can’t see you off at the airport  I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13. I regret going out alone at the night.  I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14. It’s a pity my teacher isn’t here to give us some advice. I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15. There are a lot of lessons and homework.  I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16. Mrs Taylor would like to be on the beach now  Mrs Taylors wishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 17. He is sad because he doesn’t have a new bike  He wishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18. It’s a pity I don’t take my doctor’s advice.  I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19. I’m afraid that I don’t have time to listen to you.  I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20. I’m sorry that I can’t help you with this.  I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21. He doesn’t like living in such a small house  He wishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22. What a pity the weather isn’t fine today.  I wish........................................................ 23. I haven’t enough money to buy this book.  If only...................................................... 24. I’m afraid he won’t get over his illness soon.  I wish...................................................... 25. I live in a big city, but I don’t like it.  I wish...................................................... 26. I can’t take the trip to Hanoi with her next summer.  I wish...................................................... 27. Mary is afraid she won’t be able to attend your wedding next week.  I wish...................................................... 28. I will have to leave here tomorrow.-> 29. It won’t rain tomorrow. 30. They will build a factory here so the air in the city will be polluted. -> If only they…………………………………………………………………………. 31. It’s a pity, my parents won’t visit HL bay with us next week ->If only………………………………………………… 32. I regret that you weren’t here yesterday.  I wish . . . . . . . . . . . . 33. If only I didn’t get such bad marks.  I WISH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34. We had to cancel the match.  I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35. I regret not going to airport to say goodbye her.  I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36. She is sorry that she told you the best news.  She wishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37. I’m sorry that I didn’t finish my homework last night.  I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38. What a pity! You failed your driving test.  I wish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39. I’m sorry now that I asked her to say.  Now I wish . . . . . . . . . . . . . . .

1. Viết các biểu thức sau dưới dạng lập phương của một tổng hay một hiệu: (x + y)^3 . (x – y)^3

cho biểu thức A=x+căn x/cănx -2 + 2 căn x -1 / căn x +2 + x-6 căn x +4 / x-4 a) rút gọn

1 xưởng gỗ cần 120 người làm xong trong 20 ngày,nếu có thêm 20 người nữa thì làm xong trong bao nhiêu ngày

lam dum minh phan word form vs a