aₙ = 8 - 5n
a₂₀ = 8 - 5 * 20 = 8 - 100 = - 92
Ответ : a₂₀ = - 92
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aₙ = 8 - 5n
a₂₀ = 8 - 5 * 20 = 8 - 100 = - 92
Ответ : a₂₀ = - 92