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докажите что разность квадратов двух последовательных натуральных чисел равна сумме этих чисел ПОЖАЛУЙСТА
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Предмет:
Математика -
Автор:
sterling - 5 лет назад
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Ответы 1
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Обозначим первое число х, а второе будет х+1. Составим выражение(х+1)^2 - x^2 = x^2+2x+1-x^2=2x+1 = x + (x+1) .
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Автор:
myliesjra - 5 лет назад
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Переведите текст на рус яз пожста.
Mr. Smith’s New Nose
by Chris Rose
«Well, Mr. Smith, if you prefer a different type of nose, we have a large selection available.»
«I think this nose is a bit too small.»
«Small noses are very fashionable this year, Mr. Smith, very fashionable.»
«Do you think it suits me?» asked Mr. Smith.
«I think it looks very nice,» said the shop assistant.
«OK, I’ll take it!»
On the airbus home, Mr. Smith called his wife on his wristphone.
«Hello dear! Do you like my new nose?» Mrs. Smith looked at her husband’s new nose on the videophone monitor on the wall in the kitchen.
«I think it’s a bit too small, dear,» she said.
«Small noses are very fashionable this year,» replied Mr. Smith, «very fashionable.»
«It’s all so easy now,» thought Mr. Smith. «A hundred years ago, it was impossible to change your body. Or almost impossible – there was the old-fashioned ‘plastic surgery’, but it was expensive, painful and dangerous. Ugh! Now, thanks to our 22nd century genetic engineering, we can change our bodies when we want!»
He looked at his new small nose in the mirror, and thought about how fashionable he was. He was very happy with his new nose. The only problem now, he thought, was that he needed some new hair to go with his new nose.
He looked on the Internet for some new hair, but the Internet was so slow. Eventually he decided to go to Bodyco in person.
«Good morning, Mr. Smith,» said the Bodyco shop assistant. «How can I help you today?»
Mr. Smith remembered the robot shop assistant in the Bodyco shop a few years ago. The robot was friendlier and more efficient, but too many robots made too much unemployment, and the robot was replaced by a human.
«I’d like some new hair, please.»
«Certainly, Mr. Smith. What type of hair would you like? Short, blond hair goes well with a small nose. How about short, blond hair?»
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