Chứng minh biểu thức tọa độ phép quay ( Mở rộng ) I( a, b) khác 0 M' ( x'; y') = Q (I, alpha) [ M ( x; y) ] khi đó $\left \{ {{x' = (x-a)cos \alpha - (y-b)sin\alpha+a} \atop {y' = (x-\alpha)sin\alpha+(y-b)cos\alpha+b}} \right.$

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REVISION QS TAG & WORD FORM 1. It was an_______ day. A. enjoy B. enjoyed C. enjoyable D. enjoyably 2. She sings very_______ A. beautiful B. beautify C. beautifully D. beauty 3. The accident happens because the driver drove _______. A. careful B. carefully C. careless D. carelessly 4. You should_______ for an hour. A. relaxation B. relaxed C. relax D. relaxing 5. Some young people today have a very strange_______. A. appear B. disappear C. appearance D. disappearance 6. Her clothes look very modern and _______. A. fashion B. fashionable C. fashionably D. unfashionable 7. What a _______ T. Shirt! A. color B. colorful C. colorfully D. colorless 8. I have an _______ to the party tonight. A. invitation B. invited C. invite D. inviting 9. His attempt to break the world record was _______. A. success B. successful C. successfully D. succeed 10. I met some _______ at the park last week. A. foreign B. foreigners C. foreigner D. foreignness 11. She was really _______ by the beauty of the city. A. impress B. impressive C. impression D. impressed 12. She made a deep_______ on the members of his class. A. impress B. impression C. impressed D. impressive 13. We enjoyed the _______ atmosphere in Hanoi. A. peace B. peaceful C. peacefully D. peaces 14. The _______ language in Malaysia is Bahasa Malaysia. A. nation B. international C. national D. internationally 15. We have a good _______ with our neighbors. A. relative B. relate C. relation D. relationship 16.He seldom goes to the library, ………………? A. doesn’t he B. is he C. does he D. isn’t he 17.Let’s go for a long walk, …………….? A. will we B. shall we C. don’t you D. do you 18.He thinks he will join us, …………….? A. doesn’t he B. won’t he C. will he D. does he 19.I am a bit late, …………….? A. am not I B. aren’t you C. are you D. aren’t I 20.Mary hardly ever makes a mistake, …………? A. does she B. doesn’t Mary C. doesn’t she D. doesn’t Mary 21.You saw him,………………..? A. didn’t you B. did not you C. did you not D. A & C 22.Mary lives in London,……………………………….? A. does she B. doesn’t Mary C. doesn’t she D. B & C 23.Do it right now, …………….? A. will you B. shall you C. do you D. don’t you 24.There are no easy ways to learn a foreign language, ……………..? A. are they B. are there C. aren’t they D. aren’t there 25.Let’s go to the office now, ____________ ? A. shall we B. let we C. will we D. do we 26.Somebody wanted a drink, ……………..? A. did they B. didn’t somebody C. didn’t they D. did he 27.Nothing will be better than that, ……………? A. will it B. won’t it C. will they D. won’t they 28.“ Finish your breakfast quickly,…………..?” he said angrily to his son. A. can not you B. can’t you C. will you D. don’t you 29.No one is indifferent to praise, ……………? A. is one B. isn’t one C. is he D. are they 30.Someone has left these socks on the bathroom floor, ………………? A. have they B. haven’t they C. has he D. hasn’t he đang cần gấp ạ