Публикуем задачи первого тура кубка Колмогорова. Обсудить их вы можете в комментариях👇
Задача. Внутри остроугольного треугольника 𝐴𝐵𝐶, в котором ∠𝐴 = 60°, выбирается переменная точка 𝑃 так, что ∠𝐵𝑃𝐶 = 120°. Точки 𝑃₂, 𝑃₃ симметричны точке 𝑃 относительно сторон 𝐴𝐶, 𝐴𝐵 соответственно. Прямые 𝐵𝑃₂ , 𝐶𝑃₃ пересекаются в точке 𝑄. Докажите, что описанная окружность треугольника 𝐴𝑃𝑄 проходит через точку, отличную от 𝐴 и не зависящую от выбора 𝑃 .
Публикуем задачи первого тура кубка Колмогорова. Обсудить их вы можете в комментариях👇
Задача. Внутри остроугольного треугольника 𝐴𝐵𝐶, в котором ∠𝐴 = 60°, выбирается переменная точка 𝑃 так, что ∠𝐵𝑃𝐶 = 120°. Точки 𝑃₂, 𝑃₃ симметричны точке 𝑃 относительно сторон 𝐴𝐶, 𝐴𝐵 соответственно. Прямые 𝐵𝑃₂ , 𝐶𝑃₃ пересекаются в точке 𝑄. Докажите, что описанная окружность треугольника 𝐴𝑃𝑄 проходит через точку, отличную от 𝐴 и не зависящую от выбора 𝑃 .
The S&P 500 fell 1.3% to 4,204.36, and the Dow Jones Industrial Average was down 0.7% to 32,943.33. The Dow posted a fifth straight weekly loss — its longest losing streak since 2019. The Nasdaq Composite tumbled 2.2% to 12,843.81. Though all three indexes opened in the green, stocks took a turn after a new report showed U.S. consumer sentiment deteriorated more than expected in early March as consumers' inflation expectations soared to the highest since 1981. "For Telegram, accountability has always been a problem, which is why it was so popular even before the full-scale war with far-right extremists and terrorists from all over the world," she told AFP from her safe house outside the Ukrainian capital. "The inflation fire was already hot and now with war-driven inflation added to the mix, it will grow even hotter, setting off a scramble by the world’s central banks to pull back their stimulus earlier than expected," Chris Rupkey, chief economist at FWDBONDS, wrote in an email. "A spike in inflation rates has preceded economic recessions historically and this time prices have soared to levels that once again pose a threat to growth." Either way, Durov says that he withdrew his resignation but that he was ousted from his company anyway. Subsequently, control of the company was reportedly handed to oligarchs Alisher Usmanov and Igor Sechin, both allegedly close associates of Russian leader Vladimir Putin. And while money initially moved into stocks in the morning, capital moved out of safe-haven assets. The price of the 10-year Treasury note fell Friday, sending its yield up to 2% from a March closing low of 1.73%.
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