The whole numbers from 1 to 7 are to be placed in the seven circles in the diagram. In each of the three triangles drawn, the sum of the three numbers is the same. Two of the numbers are given. What is X + Y?

Cho các số nguyên a, b, c tm: a+b+c chia hết cho 6. CM: a^3 + b^3 + c^3 cũng chia hết cho 6

Giúp mình nha (ㆁωㆁ) Nl :ko bít vẽ huhu

Chứng minh: n^3 - 5n chia hết cho 6 với mọi số nguyên n n^3 + 11n chia hết cho 6 với mọi số nguyên n

Trong xã hội hiện đại, sự phát triển của khoa học công nghệ, đặc biệt là mạng xã hội đã làm cho văn hóa đọc sách ngày càng bị mai một đi. Bằng hiểu biết của mình, hãy trình bày suy nghĩ của em về văn hóa đọc sách trong giới trẻ hiện nay.

Nội dung của hai khổ đầu bài thơ mẹ Tơm

cho hệ pt mx-y=2 2x+my=4 tìm m để hrrj pt có nghiệm duy nhất thoả mãn 2x-y + 2+m/2+m^2 = 1

1.They/going/have/party/Sunday. ................................................................... 2.After school/some students/stay/school/play sports ................................................................... 3.How /your sister/go/school/everyday?

4^x+3-3.4^x+1=13.4^11 2.3^x+2+4.3^x+1=10.3^6 3.5^x+2+4.5^x-3=19.5^10

3. Would you (have)………………. dinner with me on Friday? 4. They gave up (gamble)…… ……………..long ago. 6. They are against (make)…… ……..complaints about the road construction. 9. It is difficult for me to get used to (sleep)…… ………………earlier. 10. We are looking forward to (hear)…… ………………….from you next week. 11. Would you mind (put)…… ……………….your pet snake somewhere else? 21. I regret (inform)…………………..you that your application has been refused. 31. Reporters for major newspapers are used to (work)…… ………………..long hours. 32. People enjoyed (listen)……………….to the early radio programs. 33. The first stations were created by radio equipment companies in order (develop)……………a market for their products. 34. She had to ask the boys (stop)…… ………(make)…… …………..noise. 36. Is (boil)… …….or frying the best way of (cook)…… …..this fish? 37. There is nothing (be)……………… done about it now, except (tell)…….. ………….the police the truth. 38. You’re too young (start)…… ……giving up (build)… …………….….a career. 39. Do you remember (read)… ……………about it? - No, at that time I was too young (read)………………..…newspapers. 40. This book tells you how (win)… ……at games without actually (cheat)… ………. 41. The children prefer (watch)… ………….TV to (read)…………… 42. Stop (argue) … …………and start (work)…… …. 43. I don’t feel like (work)… ………. What about (go)………..……to a disco instead? 45. He tried (explain)…… ……..but she refused (listen)……… ……………. 46. Would you mind (show)… ……….….me how (operate)… …….………the lift? 47. Without (realize)… ………it, he hindered us instead of (help)………..… ……us. 48. People used (make)… ……………fire by (rub)……………… …..two sticks together. 49. After (hear)…… ………..the conditions, I decided (not enter)… ……….for the competition. 50. He postponed (build)………………….. a new house for them. 52. I’m very sorry for (be)… ………...late. It is kind of you (wait)…… …………...for me. 53. Forgive my (ring)…… ……you up so late, but I couldn’t allow your victory (pass)… ……….without (congratulate)… …………….you. 54. He advised me (consider)… ………….all the facts before (decide)…………(accept)… ………the job. 55. They refused (allow)…… …….us (go)… …….in without (sign)… ………..the book. 56. My uncle used (show)… …………...me where (go)… ……and what (buy)…… 58. Your doctor advised you (go)… ………to bed early, so I really can’t understand you (want)… ……...(stay)…… ……..up late. 59. I remember (hear)…………….him (say)…………..that the grass needed (cut)……………… 60. The snow kept (fall)……….and the workmen grew tired of (try)………..(keep)…………….the roads clear.