Предмет: Алгебра, автор: Аноним

Пожалуйста, помогите!

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Автор ответа: esmilya

Если понравилось решение - нажимай "спасибо" и "лучший" (рядом с кнопкой "спасибо") :)

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Автор ответа: esmilya

там формула суммы первых n-членов арифм. прогрессии.

Автор ответа: mmb1

41 таблица

b1 b2 b3 b4 b5 bn b8 b10
натуральных чисел кратных 5 5 10 15 20 25 5n 40 50
1 3 5 7 9 2n-1 15 19
кадратов натуральных чисел 1 4 9 16 25 n² 64 100
1 8 27 64 125 n³ 512 1000
при делнени на 3 остаток 2 5 8 11 14 17 3n+2 26 32

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D.B. Cooper, also known as Dan Cooper, was a criminal who, in 1971, hijacked a commercial plane travelling from Portland, Oregon, to Seattle, Washington, and later parachuted out of the aircraft with the robbed money. The police carried out an extensive manhunt, but the hijacker was never identified or caught. Therefore, D.B. Cooper became one of the greatest unsolved mysteries in U.S history.
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