Cho 0 ≤a, b, c,d≤1 Chứng minh rằng:. (a +b+c+d)²≤ 4(a² + b² + c² + d²)

Mình cần gấp chiều đi học thanks

Các bạn giúp mình nhé đang cần gấp ạ, các bạn ghi cả cấu trúc cho mình nhé. Rất cảm ơn các bạn

Giải hộ mình với ạ cảm ơn mọi người bài 2A, 2B

Giúp em câu nào cũng được ạ! Hết thì tốt ạ. Tks mn! 2. - We (go) ………………… to Cornwall next week. Where else you (want) ………………… to go? - I (be) ………………… in the country all the time. 3. I (live) ………………… in Minsk for 10 years already but I (leave) ………………… for another place soon. 4. Steven Brock is a golf player. He (win) ………………… several competitions, and he (earn) ………………… a lot of money from advertising different products. 5. Timothy Spinks was a biologist. He (study) ………………… the plants of New Zealand, and he (write) ………………… several books on biology. 6. I (send) ………………… Ed three emails last weeks, but he (not reply) ………………… to any of them yet. 7. I (buy) ………………… this bicycle five years ago and I (use) ………………… it every day since then. 8. You ever (try) ………………… to give up smoking? - Yes, I (try) ………………… last year, but then I (find) ………………… that I was getting fat so I (start) ………………… again. 9. My nephew (come) ………………… to stay with me next weekend. - Where you (put) ………………… him? ~ I (put) ………………… him in the room in the tower. 10. Mr Pitt (just / phone) ………………… to say that he (not come) ………………… back till Wednesday night

Viết đoạn văn khoảng 10 câu kể về những ngày hè của em, gạch chân các phó từ

các bạn giải giúp mình câu b , mình đang cần rất gấp....Xin cảm ơn !!! GIÚP MÌNH VOIIIIII,PLEASEEE

Một ng đứng trc một gương phẳng ccahs gương 1cm , nhìn vào gương ng đó thấy ảnh của mik a)Ảnh của ng đó cách gương bao nhiêu? b)Nếu ng đó lùi ra xa gương thêm 0,5cm thì ảnh cách ng bao nhiêu?

giúp mình nhanh nhé, trước 3h chiều nay nhanh+chính xác=ctlhn

2. - We (go) ………………… to Cornwall next week. Where else you (want) ………………… to go? - I (be) ………………… in the country all the time. 3. I (live) ………………… in Minsk for 10 years already but I (leave) ………………… for another place soon. 4. Steven Brock is a golf player. He (win) ………………… several competitions, and he (earn) ………………… a lot of money from advertising different products. 5. Timothy Spinks was a biologist. He (study) ………………… the plants of New Zealand, and he (write) ………………… several books on biology. 6. I (send) ………………… Ed three emails last weeks, but he (not reply) ………………… to any of them yet. 7. I (buy) ………………… this bicycle five years ago and I (use) ………………… it every day since then. 8. You ever (try) ………………… to give up smoking? - Yes, I (try) ………………… last year, but then I (find) ………………… that I was getting fat so I (start) ………………… again. 9. My nephew (come) ………………… to stay with me next weekend. - Where you (put) ………………… him? ~ I (put) ………………… him in the room in the tower. 10. Mr Pitt (just / phone) ………………… to say that he (not come) ………………… back till Wednesday night