Chứng minh rằng: n5 – 5n3 + 4n chia hết cho 120 với mọi số nguyên n

Mng giúp em với ạ !!! Lưu ý vẽ hình cho e luôn ạ

Mong được các anh ( chị ) , giúp đỡ ạ

Mng giúp em với ạ !!! Lưu ý vẽ hình cho e luôn ạ

(4xy+3y-5x)x²y Mn giúp em em cảm ơn

5x ²-3x(x+2) Help meeeeeeeeeeeeeeeeeeeeeeeeeeee

LÀM GIÚP MÌNH CÁC BÀI MÀ MÌNH KHOANH Ô Ạ 60 đ nên mình đăng cả lúc 4 bài , mong mod ko xoá vì đăng nhiều

1. The director (talk) ___________ on the telephone at the moment. 2. This is the first time my father (drive) ___________ in that car. 3. Up to the present, Minh (read) ___________.all the books written by Charles Dickens. 4. My sister (be) ___________ .a teacher. She (teach) ___________Mathematics. She (teach) ___________ at class 7A at present. 5. Nam’s brother (write) ___________ four novels so far. 6. It (be) ___________ very hot in the summer. 7. I (not, understand) ___________what the teacher is saying. 8. My family (visit) ___________.this museum several times. 9. I (love) ___________. you so much. Please (not, leave) ___________me. 10. You (be) ___________the only one that James (love) ___________ 11. They (not, know) ___________ how to answer this question. 12. Margaret (play) ___________football since she (be) ___________.a little girl 13. (Not, make) ___________ noise! The babies (sleep) ___________ at the moment. 14. You (play) ___________video games for 5 hours. You must go to sleep right now! 15. She (think) ___________ she (be) ___________a good friend. 16. (Do) ___________ your homework yet? 17. She (already, finish) ___________ her housework. 18. David frequently (miss) ___________the only bus to school, so he (be) ___________. sometimes late for class. 19. Maria seldom (listen) ___________to her parents’ advice. 20. Donald (visit) ___________ his parents tomorrow. 21. Water (boil) ___________.at a very high temperature. 22. I (not, like) ___________ basketball, but I(play) ___________ .it now. 23. I (not, like) ___________ basketball, but I(play) ___________ .it now.

have a look at this picture it may help you to remember something(JOG) I was too scare to tell him what I really thought. ( lacked) They sent him to prison for 3 years (sentenced)

Bài 2 : Cho Δ DEF cân tại D , đường phân giác DI . Gọi n là trung điểm IF . Vẽ điểm m sao cho N là trung điểm của DM . Chứng minh rằng : a) Δ DIN = Δ MNF , MF ⊥ EF b) DF > MF c) Góc IDN > góc NDF d) D , I , K thẳng hàng ( K là trung điểm của ME )