Bài 5: Cho đa thức f(x) =ax^3+2bx^2+3cx+4d với các hệ số a, b, c, d là các số nguyên. Chứng minh rằng không thể đồng thời tồn tại f(7)=72 ;f(3)=58.

Hãy nêu cách viết, các kí hiệu thường gặp trong tập hợp.

IV. Circle the best answer A, B, C or D: 1. My father wants to buy some stamps. Let’s go to the . A. supermarket B. factory C. Bookshop D. post office 2. Mrs. Linh wants some . Let’s go to the supermarket. A. clothes B. bread C. books D. All are correct 2. Peters wants to see some animals. Let’s go to the . A. bookshop B. library C. circus D. post office 4. Excuse me. - ? A . Thanks B. No C. Yes D. What 5. My mother lunch at 12.30. A. have B. has C. does D. plays 6. What time your father have dinner? - At 7.00 p.m. A. do B. does C. don’t D. doesn’t 7. Miss Linda works in a factory. He is a. A. worker B. teacher C. doctor D. student 8. She teaches English at Thang Long Primary School. She is a. A. worker B. student C. doctor D. teacher 9. They work in a hospital. They are . A. workers B. engineers C. students D. doctors 10. Do youbeef? - Yes, we do. A. likes B. like C. to like D. not like

5. Tìm x, biết: a) 2x(x – 5) – x(3 + 2x) = 26 b) 3x(x + 2) - 2(x + 2) = 0

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. 8. Students will ______ a two-hour examination at the end of the year. A. take B. make C. come D. do 9. This job is a lot different______ what I’m used to. A. with B. from C. about D. for 10. The young birds depend______ their parents for food several weeks. A. at B. into C. on D. by 11. She was______ that she always came top of the class. A. so clever B. too clever C. such clever D. clever enough 12. I could not eat______ I was very hungry. A. despite B. in spite of C. although D. because of 13. English is thought to be______ Math. A. harder than B. more hard than C. as hard than D. the hardest to 14. The city will have to find a solution to reduce traffic jams, ______? A. will it B. won’t it C. won't they D. will they 15. He made a______ of Roman coins and medals. A. collect B. collective C. collection D. collector 16. According to our school's regulations, students______ use mobile phones in class. A. mustn’t B. shouldn’t C. needn’t D. won’t 17. ______ go on a diet, you will not lose weight. A. If you B. If you not C. Unless you D. Unless you don’t 18. She wore______ the party last night. A. a long white wedding dress B. a white long wedding dress C. a wedding white long dress D. a long wedding white dress

giúp mình nhé bạn nào xong trước mình bìnhtronj hay nhất

Tìm x: 1+2+3+4+...+x=5050 2+4+6+8+...+2x=110 |x+5050|=5050

84. Two of these tablets should be taken ________. (day) 85. Dogs are very _______ pets. (faith) 86. The Thames flows ______ through green meadows. (gentle) 87. Relax in our ________ chairs and enjoy our excellent tea and hot chocolate. (comfor) 88. I’m so _______ you’re going to visit my country. (please) 89. What is a naughty boy! He always does things ________. (noise) 90. There were 10 ________ in the race. (complete) 91. His _________ make his parents feel sad. (lazy) 92. You should ________ to your teacher. (apology) 93. Jack is __________ of his essay on the Thames. (pride) 94. Paris is ________ for the Eiffel tower. (fame) 95. He worked hard to ________ good crops from poor soil. (product) 96. How _______ of you to break that cup! (care) 97. His long _________ made us bored and sleepy. (speak) 98. He never takes his father’s ________. (advise) 99. They sat _______ by the stream. (quiet) 100. To my _________, the monkey peeled a banana and offered it to me. (amaze)

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