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Найдите максимальное целое число из промежутка убывания функции y=x^3 + 12x^2 + 14x - 30
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Предмет:
Алгебра -
Автор:
mohammadgr0p - 6 лет назад
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Ответы 1
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Сначала найдем промежуток убывания функции, для этого возьмем производную:
И приравняем ее к нулю, чтобы найти точки экстремума:
Так как график производной функции - парабола, то положительные и отрицательные значения будут чередоваться, так как ветви направлены вверх. то будут +-+, значит, промежуток убывания = [
;
]Максимальное целое число будет заходиться около правой границы промежутка (так как ее значение больше левой).
(так как
)Мы не должны выходить за границу промежутка, поэтому берем меньшее число(10), но, так как 10 не делится без остатка на 3, значит, там нужно ближайшее меньшее число, которое делится, а это 9
Ответ: -1
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Автор:
felicitykemp - 6 лет назад
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Помогите с перевод, пожалуйста.
American newspapers get much of their news from the same sources which serve about half of the people
in the world, that is, the two U.S. news agencies AP (Associated Press) and UPI (United Press International). These two international news agencies are the world's largest. Unlike some others — the French news agency AFP or the Russian TASS, for example — neither is owned, controlled, or operated by the government. AP is the oldest agency internationally (founded in 1848) and the largest. It maintains reporters and cameramen at 122 domestic and 65 foreign news bureaus. It has some 10,000 subscribers — newspapers, radio and television stations and other agencies which pay to receive and use AP news and photographs — in 115 countries. UPI is the second largest, with 92 domestic and 81 foreign bureaus in over 90 countries. It is estimated that altogether, around 2 billion people get most of their news directly or indirectly through AP and UPI. It is also said that one reason why there seems to be so much "American" news internationally is that both agencies have their headquarters in the U.S.
A basic characteristic of the American press is that almost all editors and journalists agree that as much as possible news should be very clearly separated from opinion about the news. Following tradition and journalistic ethics, young newspaper editors and reporters are taught that opinion and political viewpoints belong on the editorial and opinion pages. They are aware that the selection of what news is to be printed can cause a bias, of course. But an attempt must be made to keep the two separate. Therefore, when a news story appears with a reporter's name, it means that the editors consider it to be a mixture of fact and opinion.
There is also a very good economic reason for this policy of separating news and opinion. It was discovered in the late 19th century that greater numbers of readers trusted, and bought, newspapers when the news wasn't slanted in one direction or another. Today, it is often difficult to decide if a paper is republican or democrat, liberal or conservative. Most newspapers, for example, are careful to give equal and balanced news coverage to opposing candidates in elections. They might support one candidate or the other on their editorial pages, but one year this might be a Republican, and the next a Democrat.
AP and UPI owe their international reputation and success to this policy. Only by carefully limiting themselves to the news — who said what and what actually happened how, when, and where — are they trusted and consequently widely used. To protect their reputations for objectivity, both AP and UPI have strict rules. These prevent newspapers from changing the original/AP and UPI news stories too much and still claiming these agencies as their source. In addition to selling news, AP and UPI make available a dozen or so photographs and political cartoons for any major story each day. These give different views and show anything from praise to ridicule. Subscribers are free to choose and print those which suit them best.
Just as there is no official or government-owned news agency in the U.S., there are no official or government-owned newspapers. There is no state censorship, no "official secrets act," nor any law that says, for example, that government records must be kept secret until so many years, have passed. The Freedom of Information Act allows anyone, including newspaper reporters, to get information that elsewhere is simply "not available." Courts and judges cannot stop a story or newspaper from being printed, or published. Someone can go to court later, but then, of course, the story has already appeared.
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