(P): y= (1 - m)x² - mx - 3

a) tìm m để hàm số đạt GTLN

b) Vẽ (P) ứng mới m= -1

c) Dùng đồ thị để biện luận theo k số nghiệm của phương trình : x² - 1/2x -k = 0

d) Dùng đồ thị để biện luận theo k số nghiệm của phương trình : | 2x² + x - 3 | = k

dùng " be going to " để viết hoàn chỉnh về sau nho từ gợi ý :

viết lại câu

1.He can touch the light because she is very tall => He is ...............

2. The porter couldn't carry this heavy suitcase because was weak => The porter wasn't ...............

3. Tom intends to visit his friend next Sunday => Tom is ......................

4. She doesn't go to the movies becauseshe doesn't have time => Because she .........................

5. To talk to Jill is interesting => It is ......................

6. Lending him money is silly => It is ............................

7. To translate the letter into english is not easy => It is .....................

8. Swimming across this river is dangerous => It is ......................

9. My brother can swimming very well => My brother is a ........................

10. Lan enjoyed taking about her favorite flim star => Lan was ...................

11. Ann dislikes traveling by plane => Ann isn't .................

12. I intend to come over to pick you up => I am .....................

13. Remember to turn off the lights before going out => Don't ...................

14. Hai is learning to drive => He is .............................

15. It isn't necessary for you to wake up so early => You don't .......................

16. You aren't allowed to make noise here => You mustn't .......................

17. It's better for you to rewiew what you have learnt => You should ...........................

18. You have beautiful hair => Your hair ..........................

19. I can't drive a car because I am only 16 years old => I am not ....................

20. The boy is too short to take the book from the shelf => The boy is not .....................

21. He likes singing English songs => He enjoys ..........................

22. To give up this job is stupid => It is .................

23. He is difficult to understand => It is .....................

24. He is tired that he can't study => He can't study because ................

25. How old is she ? => What ....................

26. What is the weather like today ? => How ........................

HELP ME ! HELP ME !!

tìm lỗi sai và sửa :

1. Each of us, however, have a different charater

2. Ba's friends sometime get tired about his jokes

3. This student is sociable, humor, and helpful

4. Lan showed her around and introduced her with many new friends

5. I'm going to a pop concert in the City Concert Center tonight

6. Mrs Lien called about her furnitures delivery

7. Van has a lot of homeworks in Math

8. Alexander Graham Bell was a Scotland although he later emigrated, first to Canada and then to the USA

9. I'll meet you at the center chess club

10. It is safe keeping medicine in locked cupboard

GIÚP MK VỚI Ạ