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hoehoe
2 năm trước
Cho phương trinh x- 2(m -1)x+ 2m -4 = 0 a) Chứng minh rằng phương trình luôn có hai nghiệm phân biệt với mọi m b) Tìm giá trị của m để x,² +x đạt giá trị nhỏ nhất
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Exercise 1: Circle the letter A, B, C or D that indicate errors need correcting 1. Nancy was refused to be given a scholarship to study abroad two days ago. She could have been very sad. A B C D 2. There is no parking sign here so you would better take your car out of here now. A B C D 3. If you are free today, you will join our party at the club. A B C D 4. The company is going to held a party to celebrate the establishment . A B C D 5. The manager would dismiss his secretary if the secretary makes such stupid mistakes in the reports. A B C D 6. The little girl says that her parents have been out but she could contact them easily A B C D 7. The men are able work better than they did last year. A B C D 8. When we were children, we use to climb over the wall to get into the neighbor’s garden. A B C D 9. If the boy had come home last night, he will have seen a gift lying on the table. A B C D 10. The New Year’s Eve party can be held in a person’s house to celebrate the changing of the calendar next A B C D week. 11. Do you please tell us the way to the nearest post office here? A B C D 12. When you feel tired of working so hard, you will take a break to relax. A B C D 13. There is a No Parking sign, so you won’t park your car here. A B C D 14. You have to be hurry if you do not want to miss the last bus. A B C D 15. The man is very intelligent because he is able to speak five languages. A B C D

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