`a)\frac{6x-3}{5x^2+x}.\frac{25x^2+10x+1}{1-8x^3}`
`=\frac{3(2x-1)}{x(5x+1)}.\frac{(5x+1)^2}{(1-2x)(1+2x+4x^2)}`
`=\frac{3(2x-1)(5x+1)^2}{x(5x+1)(1-2x)(1+2x+4x^2)}`
`=\frac{3(5x+1)}{-x(1+2x+4x^2)}`
Đề bài là tìm x nhé,giúp mk nhanh vs ak
Giúp em với ạ!!!!! Em ko biết làm
VII. Choose the best answer to complete the passage.(2,0 pts) Mary Daniel is a student in England. This year she (1)… a very interesting summer holiday. She traveled (2)….. fifteen other people to Ruwenzori Mountains in Africa. They went (3)….. to help make a road (4)…..a forest between two big towns. “It was very difficult (5) there was no water to drink and no shops where we (6)… buy food,” said Mary. “It was also very cold and wet in the mountains. It is (7)….. of the wettest places in the world”. Mary stayed in the mountains (8)…. six weeks. It was hard work, but she says it was the (9)….. thing she has ever done. She is hoping to return next year (10)…. some more work there. 1. A. had B. have C. has D. having 2. A. to B. with C. by D. for 3. A. this B. that C. here D. there 4. A. through B. on C. among D. of 5. A. so B. because C. why D. but 6. A. must B. may C. could D. should 7. A. one B. some C. any D. many 8. A. during B. for C. with D. in 9. A. good B. better C. best D. well 10. A. do B. will do C. doing D. to do VI. Give the correct forms of the verbs given in brackets. (1,0pt) 1. I will send him the message as soon as he (1. return)…….......................…… 2. A little girl can’t spend all her time (2. listen) …..............................… to stories. 3. He sent a telegram for his mother (3. learn)….................................…. good news. 4. Neither you nor she (4. want)….............................. to become a pharmacist. 5. Mumps (5. be) ……................................... an infectious disease. VIII. Read the following passage and then choose the correct answer A, B, C or D. (1,0 pt) Australia is a big country, but nearly all Australians live near the sea. On hot summer days you can see thousands of people at the beach. Many beaches have waves that are very high. These large waves are known as surf and the people who ride them are called surfers. Surfing is a skill and needs learning. Don’t expect to be able to surf properly the first time you try. However, by practicing a few time you will learn how to do it. Surfing is a new sport. Perhaps its origin needs explaining. It started hundreds of years ago in Hawaii. Men swam out to sea to catch fish and found they could come back to land very quickly by riding the waves. These first surfers did not use a board. 1. Nearly all Australians ……………….. A. on the beach B. in a big family C. near the sea D. surfing everyday. 2. Surfing is a skill and therefore, ……….. A. it is not easy to do it B. it is impossible to practice it C. it is dangerous to do it D. it needs practicing from day to day 3. Surfing is ……………………. A. a work to do B. a sport C. a job D. a way of earning money 4. Surfing started ……………….. A. five decades ago in Hawaii B. hundreds of years ago in Australia C. hundreds of years ago in Hawaii D. long ago in Australia 5. The first surfers did not use a …………….. A. board B. yatch C. canoe D. ship
Phòng học hình chữ nhật có nữa chữ vì là 15m , chiều rộng bằng 2/3 chiều dài . Tính diện tích phòng học đó
IV. Identify the mistake in each sentence and correct it. (2,0pts) 1. Where would you prefer living: in a peaceful village or in an exciting city? A B C D 2. It is a difficult time for Lan to do acquaintance with new friends in the class. A B C D 3. She never goes out without say “ goodbye” to her parents. A B C D 4. What were your height when you were 10 years old?. A B C D 5. I didn’t go to the movie yesterday evening. Neither didn’t my friend, Tom. A B C D 6. All the family members gather to have a big party at Christmas Day. A B C D 7. My mother makes me to clean my teeth twice a day. A B C D 8. It takes us 90 minutes finishing our written test. A B C D 9. The police allowed us enter the area to look for our friends. A B C D 10. Do you fancy play badminton in your free time? A B C D V. Give the correct forms of the words given in brackets. (2,0pts) 1. Women can frequently succeed ............................... in many fields. BRILLIANT 2. My elder brother is excellent at .................................... household appliences. FIX 3. I don’t like my new neighbors because they are ………………………. FRIEND 4. It is not ……………………… to listen to the same song again and again. COMFORT 5. Hung feels a lot …………………….…. after the dentist fixed his tooth. GOOD 6. People say that: “………………….… is better than cure” PREVENT 7. Don’t worry, this kind of cancer is …………………….….. CURE 8. Hoa is a very safe ………………………………….. CYCLE 9. Vo Nguyen Giap is one of the most ……………………………... generals in the world. FAME 10. The …………………….... VA 37 to Bangkok is from gate 9. FLY
làm hộ em vs ạ k phải giải thích đâu ạ
Đặt câu với According to the tradition,.............................
Cho hàm số y = -2x^4 + 4x^2 - 1 Tìm tập giá trị của hàm số biết x thuộc ( - ∞; 4).
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