Ответ:
-12
Пошаговое объяснение:
b₂ × q³ = b₅ => q = ³√(b₅ ÷ b₂) = ³√(-64 ÷ 8) = -2.
b₁ = b₂ ÷ q = 8 ÷ (-2) = -4.
S = b₁ × (q³ - 1) ÷ (q - 1) = -4 × ((-2)³ - 1) ÷ (-2 -1) = -12.
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Ответ:
-12
Пошаговое объяснение:
b₂ × q³ = b₅ => q = ³√(b₅ ÷ b₂) = ³√(-64 ÷ 8) = -2.
b₁ = b₂ ÷ q = 8 ÷ (-2) = -4.
S = b₁ × (q³ - 1) ÷ (q - 1) = -4 × ((-2)³ - 1) ÷ (-2 -1) = -12.