Tìm `x in CC` biết: $x^x+x^x=x^x$

Tìm các số nguyên x sao cho (x-1)/(9x+7) là bình phương của một số hữu tỉ

Nhờ các bạn giỏi văn đừng lơ câu hỏi của mình 😭

Giải giúp em phần lý thuyết với ạ

. Năm số 1, 2, 3, 4, 5 được chia thành 2 nhóm bất kỳ. Chứng minh rằng một trong 2 nhóm luôn có 2 số mà hiệu của chúng bằng một số trong nhóm đó

Bài 39: Lúc 6 giờ, một xe tải và một xe khách khởi hành tại địa điểm A để đi về B. Xe tải chạy với vận tốc 50 km/giờ , xe khách chạy với vận tốc 70 km/giờ. Lúc 7 giờ 30 phút một xe con cũng đi từ A để vể B với vận tốc 80 km/giờ. Hỏi sau khi xuất phát được bao lâu thì xe con sẽ đi đến điểm chính giữa khoảng cách giữa hai xe ô tô tải và xe khách. Bài 40: Một người đi bộ trên quãng đường AB dài 1km. Với vận tốc 5 km/giờ. Có một đoàn xe buýt chạy cùng chiều với người đi bộ với vận tốc 30 km/giờ. Và cứ 2 phút lại có một chiếc xe đi qua A. Hỏi có mấy chiếc xe chạy cùng chiều vượt hoặc đuổi kịp người đi bộ? Biết rằng khi xe buýt đầu tiên, của đoàn xe đi qua A thì người đi bộ cũng bắt đầu đi từ A

Giúp mình từ câu 1 đến câu 8 nhó ""))

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I. Choose the word whose the underlined part is pronounced differently from the others. 1. A. danced B. arrived C. asked D. watched 2. A. environment B. website C. widely D.live 3. A. loved B. missed C. helped D. liked 4. A. country B. encourage C. touch D. generous 5. A. parade B. lunar C. apart D. acquaintance 6. A. extensive B. highlands C. celsius D. trust II. Choose the best answer from A, B, C or D to complete the following sentences. (2pts) 1. We feel very ………….…….……… today. A. excited B. exciting C. excite D. to excite 2. He told me he ………..……….. to leave the city the following day. A. will have B. would have C. has D. had 3.Your sister works in a foreign company, ………..……… she ? A. isn't B. doesn't C. won't D. can't 4. The church ………………… about 100 years ago. A. has been built B. is built C. was built D. will be built 5. If I …………………you, I’d take some rest before the exam tomorrow. A. is B. are C. were D. would be 6. The football match was postponed …………………….the bad weather. A. despite B. in spite C. because D. because of 7. The boy…………………..eyes are brown is my friend. A.whose B. who C. whom D. which 8. The policeman warned us…………………….……there. A. not go B. to not go C. not to going D. not to go III. Give the correct form of the verbs. (1pt) 1.Would you mind if I (borrow) ……………..………… your dictionary? 2. My father (work) ………………..……….for this company since 1994. 3. They asked me where I ( come) ………………..…….………from 4. A new textbook (publish)………………………….……. by that company next year. IV. Choose the best answer from A, B, C or D. Circle the letter to complete the passage.( 1pt) Do, did, developed. With, for, fast The Internet has increasingly (1)……….and become part of our everyday life.(2)……. you find the Internet useful? What do you use the Internet for? In my opinion, the Internet is a very (3).......... and convenient way for me to get information. I can also communicate (4).......... my friends and relatives by means of e-mail or chatting. However, I don't use the Internet very often because I don't have much time. For me, the Internet is a wonderful invention of modern life. It makes our world a small village. V. Read the passage below and answer the questions. (1 pt) One of the strongest earthquakes in this century happened in Anchorage, Alaska, on March 24th at about 6 o’clock in the evening. When the earthquake stroke that evening, many families were sitting down to eat dinner. People in the city suddenly found themselves in the dark because most of the lights in the city went out when the earthquake occurred. Many people died instantly when tall building collapsed and sent tons of brick and concrete crashing into the streets. When will the next earthquake occur? No one really knows for sure 1.Where did the strongest earthquake in this century happened? ………………………………………………………………………………………………… 2. When did it happen? ………………………………………………………………………………………………… 3. What were people doing when the earthquake happened? ………………………………………………………………………………………………… 4. Does anyone know about the next earthquake? VI. Finish the second sentence so that it has the same meaning as the first one. (1pt) 1. He is sorry he is not able to speak English well. He wishes........................................................................................................................................ 2. “ Do you remember to lock the door?” My father asked me………………………………………..……………….………..….… 3. I don’t have a map so I can’t show you the way. If ..................................................................................................................................................... 4. They will build a new school in Bac Giang city next year. A new school .................................................................................................................................. VII. Choose the best answe r from A, B, C or D to complete the following sentences. (1.5 pts) 1. People in Israel are going to celebrate their festival ________is called Passover. A. whose B. who C. which D. where 2. Lan is very tired. ________, she has to finish her assignment before going to bed. A. Although B. So C. Therefore D. However 3. I suggest ________some money for poor children. A. raise B. to raise C. raised D. raising 4. She asked me if I_ _______a laptop computer the following day. A. would buy B. will buy C. bought D. buy 5.Mr. Pike sold his house, _________he? A. didn't B. could C. did D. couldn't 6. It’s dangerous ________________ in this river. A. swim B. swims C. to swim D. swam

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