a₇ = 2
a₈ = 2² - 1 = 3
a₉ = 3² - 1 = 8
Ответ : a₉ = 8
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Verified answer
a₇ = 2
a₈ = 2² - 1 = 3
a₉ = 3² - 1 = 8
Ответ : a₉ = 8