Решение
b₂ = 36
b₄ = 16
Применим основное характеристическое свойство:
b₃ = √(b₂b₄) = √(36*16) = 24
q = b₄ / b₃
q = 24/36 = 2/3
b₁ = b₂/q = 36/(2/3) = 54
Sn = b₁ / (1 - q)
<span>Sn = 54/ (1 - 2/3) = 54 / (1/3) = 162</span>
(a³*a⁴)/a¹¹=a⁷/a¹¹=1/a⁴=1/(-0.5)⁴=1/0.0625=16
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