Giải thích các bước giải:
$\begin{split}f(x)&=x^4-2(m-1)x^2+2m-3\\&=x^4-2(m-1)x^2+2(m-1)-1\\&=(x^4-1)-(2(m-1)x^2-2(m-1))\\&=(x^2-1)(x^2+1)-2(m-1)(x^2-1)\\&=(x^2-1)(x^2+1-2(m-1))\\&=x^2-1)(x^2-2m+4)\end{split}$
Em hãy nêu nội dung bài hát niềm vui của em
P/s: Cao nhân giúp em với ạ, "quà j trả cho" !!! CHOOSE THE CORRECT ADJECTIVES 1. Are you (interesting/ interested) in football? 2. The football match was quite (exciting/ excited). I enjoyed it. 3. It’s sometimes (embarrassing/ embarrassed) when you have to ask people for money 4. Do you usually get (embarrassing/ embarrassed)? 5. I had never expected to get the job. I was really (amazing/ amazed)when I was offer it. 6. She has really very fast. She has made (astonishing/ astonished) progress 7. I didn’t find the situation funny. I was not (amusing/ amused) 8. It was a really (terrifying/ terrified). Afterwards everybody was very (shocking/shocked) 9. Why do you always look so (boring/ bored)? Is your life really so (boring/ bored)? 10. He’s one of the most (boring/ bored) people I’ve ever met. He never stops talking and he never says anything (interesting/ interested). 11. At first I thought Jake was an (interesting/ interested)guy, but tonight I felt somewhat (boring/ bored) with his company. 12. She has really learnt very fast. She has made( astonishing/ astonished) 13. It was very( disappointing/ disappointed) not to get the job. 14. Philip was exceptionally( annoying/ annoyed )at Joanne's behaviour. 15. I thought the program on wildlife was (fascinating/ fascinated). I was absolutely( fascinating/ fascinated) 16. We were( thrilling/ thrilled) to hear your good news. 17. It was really( terrifying/ terrified).Afterwards, everybody was very( shocking/shocked). 18. The journey took all day and night. They found it very( tiring/ tired). 19. Did Tim feel( frightening/ frightened )when he saw the snake at his feet? 20. Why do you always look so (boring/ bored). Is your life really
cho đường tròn tâm O,đường kính AB=2R và đường tròn tâm I đường kính OA.Trên đường tròn tâm (I) lấy điểm M (khác với A và O) tại C,gọi D là giao điểm thứ 2 của CA với (I) Chứng minh: ΔADM cân
tìm x biết : a, 350 -x = 49 + 2 ( 3x -21) b,(x^2 - 9 ) . ( x ^ 3 + 27 ) =0
Hòa tan hoàn toàn 28,02g hỗn hợp gồm Al, Cu, Ag, Mg vào dung dịch HCl dư thu được 6,72 lít khí H2 (đktc), chất rắn A và dung dịch B. Cô cạn dung dịch B thu được 27,5g chất rắn khan. Khối lượng chất rắn A là:
Giải giúp mình câu39,với câu 42 với !!!!!!!!!
giải hộ em câu này với ạ Chọn từ có phần gạch chân phát âm khác với các từ còn lại 1.A. started B. filled C. visited D. needed 2.A. hour B. house C. hot D. healthy 3.A. school B. chemistry C. children D. character 4.A. asked B. stopped C. called D. watched 5.A. think B. this C. mother D. the
2.My father ……………………… a car to work every day. A. drive B. to drive C. driving D. drives 3. ………….. do you take morning exercises ?- Because it is good for my health. A. what B. when C. why D. where 4. ……………………..… apples do you want to buy ? A. How often B. How far C. How much D. How many 5 .Do you know……………… Hoa is ? – She is at school now. A. which B. who C. where D. what 6. ………….. do you play football ? – Because I like it. A. why B. which C. where D. what 7. …………….. do you go to school ? I go to school by bike. A. How B. what C. when D. where 8. My brother used to go work ………………………. bike. A. by B. to C. on D. in 9.I …………..…………. to school on foot. A. go B. to go C. going D. goes 10.I like watching TV, ………………. I watch it in my free time. A. so B. when C. but D. or 11. …………. Do you brush your teeth ?- Twice a day. A. how often B. how far C. how many D. how much 12.I want to work in television industry, …………. I am working hard. A. because B. although C. so D. and 13.Children like watching …………………. A. cartoon. B. weather C. news D. horror. 14. …….. are you so late ? Because I get up late. A. what B. where C. why D. How 15. …………. Are you talking to ? - Nam A. who B. when C. what D. How
Cho ∆ABC có A(1;1) ; B(2;1) ; C(4;1). Tìm tọa độ a) Trực tâm ∆ABC b) Tâm đường tròn ngoại tiếp ∆ABC c) Hình chiếu vuông góc của A lên ∆ABC d) A' đối xứng với A qua BC
II. Write a mail (80-100 words) to your friend to tell him/her about the latest sports event in your school. You can base on some suggestions below: - What was the sports event? - When was it? - Who joined it? - What happened? - How did you feel about that? Dear ........................, ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... Love, ...........................(Your signature)
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến