Предмет: Математика, автор: azret30103

В последовательности чисел первое число 4, а каждое следующее больше предыдущего на 5. Найдите пятнадцатое число.

Ответы

Автор ответа: marsova99

4

4 9 14 19 24 29 34 39 54 59 64 69 74 79 84

Автор ответа: table123

6

это арифметич. прогрессия а(n)=a(1)+d(n-1) a(15)=4+5(15-1)=4+70=74

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San Francisco
- capital of cool
San Francisco is a very cool
place. It's the home of hippies
and 'flower power, and it's
full of friendly, relaxed
people. it's also one of the
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into busy Chinatown. Go up
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west and San Francisco Bay to
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anywhere in the States.
views of the Bay, and its
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mountains of the Sierra Nevada.
The best way to explore San
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San Francisco is a popular
place to visit at any time of
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queues are longer, and finding
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The best months for weather
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O
2 Is it a good idea to dive around when you visit?
3 Which are the best two areas for music and dancing?
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O
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