b₁ = - 16 q = - 1,5
b₂ = b₁ * q = - 16 * (- 1,5) = 24
b₃ = b₂ * q = 24 * (- 1,5) = - 36
b₄ = b₃ * q = - 36 * ( - 1,5) = 54
b₅ = b₄ * q = 54 * (- 1,5) = - 81
b₁ = - 16 q = - 1,5
b₂ = b₁ * q = - 16 * (- 1,5) = 24
b₃ = b₂ * q = 24 * (- 1,5) = - 36
b₄ = b₃ * q = - 36 * ( - 1,5) = 54
b₅ = b₄ * q = 54 * (- 1,5) = - 81