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Search found 102 results on 5 pages for 'syom'.

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• Calculating number of online visitors?

  - by Syom

  i need to show the number of online visitors, but there is a problem with selecting algoritm to do it! maybe i must create a table in DB, where i'll store ip addresses of visitors and time of visit! by so i can show the count of ip addresses, which's time = NOW() - 10 minutes, for example...("now()-10 minutes" is just to show the logic, i know that this is not a function:) is this goog way to go? or maybe it's better to use AJAX methods to store the data? please give me an idea. Thanks

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• prove, that if sqr(a) + sqr(b) divisible on 7, then a + b divisible on 7 too [closed]

  - by Syom

  how can i prove, that if sqr(a) + sqr(b) divisible on 7, then a + b divisible on 7 too. i'm thinking on it whole day... Thanks

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