`f(x)=2x^4+3x^2-x+1-x^2-x^4-6x^3`
`=(2x^4-x^4)-6x^3+(3x^2-x^2)-x+1`
`=x^4-6x^3+2x^2+1`
`g(x)=2x^3-(x-x^2-x^3)`
`=2x^3-x+x^2+x^3`
`=(2x^3+x^3)+x^2-x`
`=3x^3+x^2-x`
Ta có: `f(x)=h(x)+g(x)`
`=>h(x)+3x^3+x^2-x=x^4-6x^3+2x^2+1`
`=>h(x)=x^4-6x^3+2x^2+1-3x^3-x^2+x`
`=>h(x)=x^4-9x^3+x^2+x+1`
Đáp án:
`H(x)=x^4-3x^3+x^2-215`
Giải thích các bước giải:
Có:` F(x)=H(x)+G(x)`
`=> H(x)=F(x)-G(x)`
`H(x)=2x^4+3x^2-x+1-x^2-x^4-6^3-[2x^3-(x-x^2-x^3)]`
`H(x)=2x^4+3x^2-x+1-x^2-x^4-6^3-(2x^3-x+x^2+x^3)`
`H(x)=2x^4+3x^2-x+1-x^2-x^4-6^3-2x^3+x-x^2-x^3`
`H(x)=(2x^4-x^4)+(-2x^3-x^3)+(3x^2-x^2-x^2)+(-x+x)+(-6^3+1)`
viết topic ''talk about your traffic problems" [càng ngắn càng tốt]
đặc điểm tài nguyên và môi trường biển đảo nước ta
Một xe máy đi từ A lúc 7 giờ sáng , đến B lúc 8 giờ 20 phút. Xe đó đi với vận tốc 45km/giờ. Xe máy nghỉ ở B 30 phút rồi đi về với vận tốc gấp đôi vận tốc lúc đi. Hỏi mấy giờ xe máy có mặt tại A
giúp mình với mình đang cần gấp ai trả lời nhanh được 5 vote
Cho chất saccarozơ ,tinh bột, xenlulozơ và protein số chất thủy phân trong môi trường axit có đun nhẹ (hoặc enzym) ở `t^0` thường đều tạo ra glucozơ là : `A,2` `B,3` `C,1` `D,4`
I) Complete the following sentences by using reported speech. ( Hoàn thành các câu sau sử dụng lời nói gián tiếp (câu tường thuật) 1. Nam said: “ I am told to be at school before 7 o’clock”. -> Nam said (that) he ........... 2. Thu said :” All the students will have a meeting next week”. -> Thu said (that) ............. 3. Phong said : “ My parents are very proud of my good marks”. ->Phong said (that)............ 4. Lan said to Tam: “ You should stay at home and do the homework”. -> Lan told Tam (that) ..................... 5. Lien said to her brother, “ You ought to clean your room”. ->Lien told to her brother (that) ............. 6. The teacher said, “All the homework must be done carefully”. -> The teacher said (that) ............ 7. Tam said, “ I could swim across the river”. ->Tam said (that) ...................... 8. Her father said to her: “You can go to the movie with your friend”. ->Her father said (that)...................... 9. Hoa said: “I may visit my parents in summer”. ->Hoa said (that) ........................ 10. The students said: “we should finish our work before going out for lunch”. -> The students said (that) ...................... 11. The teacher said: “We can collect old books for the poor students”. ->The teacher said (that) ...................... 12. She said: “She doesn’t buy this book”. ->She said (that) ....................... 13. The boys said “ We have to try our best to win the match”. ->The boys said (that) ........................ 14. Her mother told her “ You ought to wash and iron your own clothes” ->Her mother said (that) ............................ 15. My teacher told me “You should read these books”. ->My teacher said (that) ....................... 16. Her classmate said “Lan is the most intelligent girl in our class”. ->Her classmate said (that).......................... 17. They told us “Our friends will get the award for their highest scores”. ->They told us (that) ......................... 18. He said “ I will go to school by bus tomorrow”. ->He said (that) ............................... 19. My grandparents told me “We will travel around the world by plane”. ->My grandparents said (that) ........................ 20. Phong said “I need to learn more vocabulary”. ->Phong said (that) .............................. 21. Lan said “I have to do more grammar exercise”. ->Lan said (that) ............ 22. Tinh told Lien “You may go shopping with your friends”. ->Tinh said (that) ..................... 23. The girls said “We ought to finish our homework tonight”. ->The girls said (that) ................. 24. The leader of the group said “We’ll play with our best to win the prize for our school”. ->The leader of the group said (that) ...................... 25. His brother told him “You can use my computer today”. ->His brother said (that) ........................ 26. The coach told the players “ You have to train harder for the next match”. ->The coach said (that)...................... 27. Tam’s sister told him “ You ought to help me to clean the house”. ->Tam’s sister said (that)............ 28. Hoa’s parents said “We’ll visit you this summer”. -> Hoa’s parents said (that) .......... 29. Mai said, “I cannot go to the movies with you, Nam”. ->Mai said (that) ..................... 30. “ I will expect to see you next Wednesday”, Mary said to her friend. -> Mary told to her friend (that)........................
1 xe cẩu có công suất 15 kW, để nâng một vật nặng 1 tấn lên độ cao 6m. Biết hiệu suất của động cơ là 80% a. Tính công có ích của động cơ? b. Tính thời gian nâng vật?
em hãy đóng vai người dẫn chương trình và hãy viết lời dẫn cho bài hát Tiếng ve gọi hè
giải pt |3x|=x+6 giúp mình bài này với
Trong các câu sau câu nào toàn ôxit axit: SO2;P2Ó;CO2; HgO;SO2;CuO; CO2;CaO;NO; PbO;Na2Ố2.
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