Cho P=(căn x/căn x -1 - 1/căn x +1):(1/căn x +1 + 2/x-1) vs x>0,x khác 1 a)rút gọn P b) tính P khi x=4- 2 căn 3

Giải gấp giúp mình câu a và b nha

điện trở tương đương của đoạn mạch AB là 12 ôm.tính R vẽ lại mạch và tính

SO2+H2O---> CO2+H2o---> P2O5+H2O---> SIO2+H2O----> cần gấp

Giải giúp mình bài này với ạ. Viet lớp 9

III. Read the passage and answer the questions. (1pt) TRADITIONS AND CUSTOMS IN GREAT BRITAIN Every nation and every country has its own customs and traditions. In Britain traditions play a more important part in the life of the people than in other countries. Englishmen are proud of their traditions and carefully keep them up It has been the law for about 300 years that all theatres are closed on Sundays. No letters are delivered, only a few Sunday papers are published To this day an English family prefers a house with a garden to a flat in a modern house with central heating. English people like gardens. Sometimes the garden in front of the house is a little square covered with cement painted garden in imitation of grass and a box of flowers. Holidays are especially rich in old traditions and are different in Scotland, Ireland, Wales and England. Christmas is a great English national holiday, and in Scotland it is not kept, except by clerks in banks, all shops and factories are working. 1. How important are traditions in Britain? => ………………………………………………………………………………………. 2. What do Englishmen do to their traditions? => …………………………………………………………………………………………… 3. Which does an English family prefer, a house with a garden or a flat? => ………………………………………………………………………………………… 4. Find sentences in the text which shows that the English people like gardens very much. => ……………………………………………………………………………………. 5. How is Christmas kept in Scotland? => …………………………………………………………………………………………. PART FIVE: WRITING (5pts) I. Rewrite each of the following sentences so that it means the same as the first one, beginning with the given words. (2 pts) 1. I would like you to help me put the chairs away. => Do you mind __________________________________________________________? 2. I haven’t enjoyed myself so much for years. => It’s years ______________________________________________________________. 3. You can try to get Tim to lend you his car, but you won’t succeed. => There is no point ________________________________________________________. 4. Is it really necessary for us to arrive so early? => Do we really __________________________________________________________? 5. Be careful or you may fall. => If you ________________________________________________________________. 6. This is my first visit to Scotland. => I have ________________________________________________________________. 7. Mark is too young to see the horror film. => Mark is not ____________________________________________________________. 8. Please don’t make any noise; I'm very tired. => I'd rather ______________________________________________________________. 9. I expected them to offer me that job. => I expected _____________________________________________________________. 10. Vinh keeps forgetting his homework => Vinh is _______________________________________________________________. II. Use the given suggestions to complete sentences. 1. you / mind / if / I / stay / here? => _____________________________________________________________________? 2. I / invite / her birthday party / last week. => ______________________________________________________________________. 3. The concert hall / so crowded / I / see / hear / nothing. => ______________________________________________________________________. 4. It / very kind / you / make friend / me. => ______________________________________________________________________. 5. This book / is/ interesting enough / you / read. =>______________________________________________________________________.

D. WRITING (3.0/10) I. Rearrange the words to make sentences. 71. to/enough/not/old/ horror/ my sister /films/is/watch. 72. meet/I/the/going/headmaster/am/to/tomorrow. 73. Sundays/have/on/work/to/doctors. 74. train/we/by/used/go/Hanoi/Hochiminh City/from/to/to. 75. smoking/should/up/we/give. II. Write sentences from the given cues. 76. She/warn/stay away/water. 77. My brother/study/English/for/5 years. 78. my hat/different/your hat 79. No one/class/more intelligent/Daisy. 80. Her roses/beautiful/than/roses/I/buy/yesterday. III. Rewrite these sentences in such a way that the sentences you write remain unchanged from the original ones. 81. We are more careful than the students in class 8B. The students in class 8B ………………………………… 82. My teacher cooks very well. My teacher is ……………………………………………………… 83. It is necessary for you to revise your lessons before the examination. You had …………………………………………………. 84. This is the tallest building in the town. No ………………………………………………. 85. “This box is too heavy, so I can’t lift it now” said Dick. Dick said ………………………………………….

Câu 1. Công cuộc khôi phục kinh tế, hàn gắn vết thương chiến tranh ở Liên Xô đã diễn ra và đạt kết quả như thế nào? Ý nghĩa những kết quả mà Liên Xô đạt được . Câu 2. Trình bày phương hướng của Liên Xô trong thời kì xây dựng chủ nghĩa xã hội từ 1950 đến đầu những năm 70 của thế kỉ XX. Giups em câu 1 phần ý nghĩa và câu 2 ạ

Cho ABC có AB = AC. Kẻ AE là phân giác của góc (E thuộc BC). Chứng minh rằng: a. ABE = ACE b. AE là đường trung trực của đoạn thẳng BC. Có hình vẽ và giả thiết nha mọi người.

Cho hỗn hợp gồm 5,4g nhôm và 11,2 g sắt tác dụng hết với dd HCl dư . Sau phản ứng hoàn toàn, thu đc V lít khí hidro(đktc). 1. tính số mol của Al, Fe và viết PTPU xảy ra 2. tính giá trị V?