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Из оптического свойства коник легко вывести, что софокусные эллипс и гипербола перпендикулярны. Рассмотрим теперь пару эллипсов и пару гипербол с общими фокусами. Теорема Айвори утверждает, что диагонали образованного ими криволинейного прямоугольника равны.
Было бы интересно найти чисто геометрическое доказательство.
Из оптического свойства коник легко вывести, что софокусные эллипс и гипербола перпендикулярны. Рассмотрим теперь пару эллипсов и пару гипербол с общими фокусами. Теорема Айвори утверждает, что диагонали образованного ими криволинейного прямоугольника равны.
Было бы интересно найти чисто геометрическое доказательство.
Overall, extreme levels of fear in the market seems to have morphed into something more resembling concern. For example, the Cboe Volatility Index fell from its 2022 peak of 36, which it hit Monday, to around 30 on Friday, a sign of easing tensions. Meanwhile, while the price of WTI crude oil slipped from Sunday’s multiyear high $130 of barrel to $109 a pop. Markets have been expecting heavy restrictions on Russian oil, some of which the U.S. has already imposed, and that would reduce the global supply and bring about even more burdensome inflation. Anastasia Vlasova/Getty Images "The argument from Telegram is, 'You should trust us because we tell you that we're trustworthy,'" Maréchal said. "It's really in the eye of the beholder whether that's something you want to buy into." During the operations, Sebi officials seized various records and documents, including 34 mobile phones, six laptops, four desktops, four tablets, two hard drive disks and one pen drive from the custody of these persons. What distinguishes the app from competitors is its use of what's known as channels: Public or private feeds of photos and videos that can be set up by one person or an organization. The channels have become popular with on-the-ground journalists, aid workers and Ukrainian President Volodymyr Zelenskyy, who broadcasts on a Telegram channel. The channels can be followed by an unlimited number of people. Unlike Facebook, Twitter and other popular social networks, there is no advertising on Telegram and the flow of information is not driven by an algorithm.
from sa
