Завершился кубок Колмогорова личной олимпиадой 🥇Публикуем ее условия 📝
Задача. Трапеция 𝐴𝐵𝐶𝐷 с основаниями 𝐴𝐷 и 𝐵𝐶 вписана в окружность 𝜔. Диагонали трапеции пересекаются в точке 𝐾. На лучах 𝐾𝐴 и 𝐾𝐵 выбраны точки 𝑋 и 𝑌 соответственно так, что отрезок 𝑋𝑌 касается 𝜔 в своей середине 𝑍. Докажите, что 𝑍 лежит на продолжении средней линии трапеции 𝐴𝐵𝐶𝐷.
Завершился кубок Колмогорова личной олимпиадой 🥇Публикуем ее условия 📝
Задача. Трапеция 𝐴𝐵𝐶𝐷 с основаниями 𝐴𝐷 и 𝐵𝐶 вписана в окружность 𝜔. Диагонали трапеции пересекаются в точке 𝐾. На лучах 𝐾𝐴 и 𝐾𝐵 выбраны точки 𝑋 и 𝑌 соответственно так, что отрезок 𝑋𝑌 касается 𝜔 в своей середине 𝑍. Докажите, что 𝑍 лежит на продолжении средней линии трапеции 𝐴𝐵𝐶𝐷.
Right now the digital security needs of Russians and Ukrainians are very different, and they lead to very different caveats about how to mitigate the risks associated with using Telegram. For Ukrainians in Ukraine, whose physical safety is at risk because they are in a war zone, digital security is probably not their highest priority. They may value access to news and communication with their loved ones over making sure that all of their communications are encrypted in such a manner that they are indecipherable to Telegram, its employees, or governments with court orders. False news often spreads via public groups, or chats, with potentially fatal effects. For Oleksandra Tsekhanovska, head of the Hybrid Warfare Analytical Group at the Kyiv-based Ukraine Crisis Media Center, the effects are both near- and far-reaching. Now safely in France with his spouse and three of his children, Kliuchnikov scrolls through Telegram to learn about the devastation happening in his home country. Markets continued to grapple with the economic and corporate earnings implications relating to the Russia-Ukraine conflict. “We have a ton of uncertainty right now,” said Stephanie Link, chief investment strategist and portfolio manager at Hightower Advisors. “We’re dealing with a war, we’re dealing with inflation. We don’t know what it means to earnings.”
from fr
