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У задачи выше есть разные решения — например, такое:
Будем считать сторону квадрата равной 1. Если одна из сторон прямоугольника равна A, то его площадь не больше A (ведь вторая сторона не больше 1). Поэтому суммарна длина отмеченных отрезков не меньше суммарной площади всех прямоугольников, т.е. 1.
Задача, кстати, была на ММО и на Турнире городов, предложил ее В.В.Произволов.
У задачи выше есть разные решения — например, такое:
Будем считать сторону квадрата равной 1. Если одна из сторон прямоугольника равна A, то его площадь не больше A (ведь вторая сторона не больше 1). Поэтому суммарна длина отмеченных отрезков не меньше суммарной площади всех прямоугольников, т.е. 1.
Задача, кстати, была на ММО и на Турнире городов, предложил ее В.В.Произволов.
BY Геометрия-канал
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Stocks dropped on Friday afternoon, as gains made earlier in the day on hopes for diplomatic progress between Russia and Ukraine turned to losses. Technology stocks were hit particularly hard by higher bond yields. Russians and Ukrainians are both prolific users of Telegram. They rely on the app for channels that act as newsfeeds, group chats (both public and private), and one-to-one communication. Since the Russian invasion of Ukraine, Telegram has remained an important lifeline for both Russians and Ukrainians, as a way of staying aware of the latest news and keeping in touch with loved ones. The Securities and Exchange Board of India (Sebi) had carried out a similar exercise in 2017 in a matter related to circulation of messages through WhatsApp. "We as Ukrainians believe that the truth is on our side, whether it's truth that you're proclaiming about the war and everything else, why would you want to hide it?," he said. The last couple days have exemplified that uncertainty. On Thursday, news emerged that talks in Turkey between the Russia and Ukraine yielded no positive result. But on Friday, Reuters reported that Russian President Vladimir Putin said there had been some “positive shifts” in talks between the two sides.
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