Вопрос школьника по предмету Алгебра
Найдите первый член арифмитической прогрэсии (а n), если а6=72 d=-2
помогите пожалуй сто!
Ответ учителя по предмету Алгебра
а6 = а1+ (-2)*(6 — 1)
72 = а1 — 10
а1 = 72 +10
а1 = 82
Найдите первый член арифмитической прогрэсии (а n), если а6=72 d=-2
помогите пожалуй сто!
а6 = а1+ (-2)*(6 — 1)
72 = а1 — 10
а1 = 72 +10
а1 = 82
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