Предмет: Алгебра, автор: eshihaleev

Дана арифметическая прогрессия (an): 1,3,5....НАЙДИТЕ A11

Ответы

Автор ответа: lidusya13

0

d=3-1=2;
An=a1+d(n-1);
А11=1+2(11-1);
А11=21

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