Предмет: Математика, автор: Rostik8022777

Задание 1. [2] Последовательность задана формулой аn=2n+5. Определите номер члена последовательности равного 27.​

Ответы

Автор ответа: dyexfnf
1

Ответ:

Пошаговое объяснение:

Решение: аn = 27, подставим в формулу :

27=2n+5

-2n= 5 - 27

-2n= - 22

n = -22 : ( -2)

n = 11

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