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nguyenducvu1808
2 năm trước
Tìm các ước chung của hai số n + 3 và 2n +9 với ne N. 2. Cho a, b là hai số tự nhiên không nguyên tố cùng nhau, a = 4n + 3 và b = 5n + 1 (n €N).Tìm ƯCLN(a, b) Giúp mình với.
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1. Read the passage, and then decide whether the statements that follow are True (T) or False (F). In my opinion, using the computer as your hobby can be harmful to both your health and your social life. Firstly, sitting all day in front of the computer can cause health problems such as eye-tiredness and obesity. Secondly you may get irritated easily. Besides, if you use the computer too much, you will not have time for your family and friends. In short, computers should only be used for a limited time. 1. Using the computer too much can make your eyes tired. 2. Using the computer too much is not good for you. 3. We still can spend a lot of time with our family and friends. 4. According to the writer, we can use the computer for a long time. 5. Computers should only be used for a limited time.

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