Рассмотренная выше формула с бесконечно повторяющимися радикалами являются частным случаем более общей формулы:
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Источник, где эта формула выводится более строго: A. Herschfeld, On Infinite Radicals, American Mathematical Monthly 42 (1935), no. 7, 420–421.
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Some messages aren’t supposed to last forever. There are some Telegram groups and conversations where it’s best if messages are automatically deleted in a day or a week. Here’s how to auto-delete messages in any Telegram chat. You can enable the auto-delete feature on a per-chat basis. It works for both one-on-one conversations and group chats. Previously, you needed to use the Secret Chat feature to automatically delete messages after a set time. At the time of writing, you can choose to automatically delete messages after a day or a week. Telegram starts the timer once they are sent, not after they are read. This won’t affect the messages that were sent before enabling the feature.
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