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Anhducbat
2 năm trước
chưng minh 1) a . (a-1) - (a + 2) . (a +3) chia hêt cho 6 2) a .(a+2) - (a - 7) .(a-5) chia hêt cho 7 3) (a² + a - 1 ) ² -1 chia hêt cho 24 4) a ³ - 25a chia hêt cho 6 giúp với =vote 5 sao :)
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Many people buy and use copied programs for the computer. This illegal copying of computer softwa has become a huge industry because the software is much cheaper than the original programs. Illeg- software can be found on sale in any part of the world although it is more rapidly available in Asian tha in Western countries. Software manufacturers have been trying to get governments to stop this copying o- "pirating". In an attempt to get grid of "software pirates", police have seized software form stores anc fined the owners. This has been partially successful, but manufacturers are still losing a lot of money. By using this kind of software, computer owners risk damaging their computer. Illegally copied software can carry computer viruses which could wipe out information stored on the computer's hard driver. 46. Computer software is A. part of all computers B. poor quality computer 47. People buy pirated software because it is A. readily available 48. Pirated software is found A. worldwide 49. In some countries, owners of illegal software have A. asked their government to stop the pirating C. given their software to the police 50. According to the passage, computers can be damaged by A. all software C. pirated programs D. programs used by a B. good quality C. inexpensive D. easy to use B. only in Asia C. only in the West D. in a few countries B. been forced to pay money D. asked the police to help them B. no software C. illegal software D. hard driver.

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