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kimdung28
2 năm trước
chứng minh rằng q=(x^2-1)(1/(x-1)-1/(x+1)+1) luôn dương với x=1,-1
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X. Read the passage and do the tasks below. Collecting things is an interesting hobby. People collect a lot of things such as stamps, milk bottle labels, comic books as well as car toys. Someone who has much money can collect sport cars. Amy is a skillful and interesting woman. She is twenty years old. She is working as a hairdresser. Any has a strange hobby that is collecting candy shells. Her friends and relatives always give her shells after eating candy. She has a big collection of candy shell now. She thinks she will make a special dress. If she has more shells, she will make other things such as walless or shoes. This makes her happy. Collecting things is a wasse of time and money. However, people still consider it as a good. A. Answer the following questions 1 What do people collect? ...................................................... 2. How old is Amy? ......................................................... 3. What does she do? ...................................................... 4. What is her hobby? ..................................................... 5. Who give her candy shells? ......................................................

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