Помогите,пожалуйста.Можно просто ответ, без решения

Решение 1) b₅ = 32 ; q = - 2 b₅ = b₁ * q⁴ b₁ = b₅/q⁴ = 32/(-2)⁴ = 2 b₂ = b₁*q = 2*(-2) = - 4 2)  b₄ = 3/8 ; q = 1/2 b₄ = b₁*q³ b₁ = b₄/q³ = 3/8 : (1/2)³ = 3 S₄ = [b₁ - b₄*q)/(1 - q) S₄ = [3 - (3/8)*(1/2)] / (1 - 1/2) = (3 - 3/16) / 0,5 = = (45*2)/16 = 45/8 3)  b₃ = 2/9 q = - 1/3 b₃ = b₁*q² b₁ = b₃/q³ = (2/9) : (- 1/3)² = 2 b₂ = b₁*q = 2 * (- 1/3) = - 2/3 b₁ + b₂ = 2 + (- 2/3) = 1 (1/3) = 4/3 4)  b₅ = 16 q = 2 b₅ = b₁ * q⁴ b₁ = b₅/q⁴ =16/2⁴ = 1 b₃ = b₁*q² = 1 * 2² = 4 S₃ = (b₁ - b₃*q)/(1 - q) S₃ = (1 - 4*2)/(1 - 2) = 7 5)  b₁ = 1 q = √2 b₁₅ = b₁*q¹⁴ = 1 * (√2)¹⁴ = 2⁷ = 128 S₁₅ = (b₁ - b₁₅*q)/(1 - q) = (1 - 128√2)/(1 - √2)