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Сколько пятизначных номеров можно составить из девяти цифр 1,2,3,4,5,6,7,8,9?
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Предмет:
Математика -
Автор:
rodrigo74 - 6 лет назад
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Ответы 1
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Такие номера являются кортежами длины 5, составленными из элементов множества x= (1,2,3,4...9)? По формуле вычислим:А9^5=9^5=59049
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Автор:
eddiec4yo - 6 лет назад
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Marie curie was born maria Sklodowski in Warsaw, Poland in 1867. She was the youngest of five children. Her parents worked as teachers and they brought her up to love learning. Her mother died in 1877. Manya, as they called her, and her sisters had to get jobs. manya became a tutor for a family. She enjoyed her term there and could send money to her father and her sister, Bronya, who was studying medicine in paris. When her sister got married, she invited Manya to live with them and study at the Sorbonne. It was then that she altered her name to Marie. Marie studied Physic and Maths and got her Master's degree in both subjects. When she graduated from university, she started research for magnetism. It was at that time she met Pierre Curie, a young scientist. They fell in love immediately and got married. Marie moved to his house and they both started examining uranium and other elements to decide whether they were radioactive. It took them four years to isolate the radioactive source which she named radium. For this, they gained a Nobel Prize in Physics in 1903. In 1906, her husband died in an accident and Marie got the position they had offered him at the Sorbonne. In 1911, she got a Nobel Prize in Chemistry. When World War I, she designed the first mobile X-Ray machine and travelled with it along the front lines. Marie died in july. 1934 in Paris. She died by radiation poisoning. She worked hard and proved that if a person keeps to their goals, they will succeed. For her, success came with the two Nobel Prizes she received and fast that she was the first woman to ever get one. We all owe her our respect and admiration.
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