Questão 2713649

r₁ + r₂ + r₃ + ... + r_n-1 + r_n \(=-\ \frac{a\ n-1}{an}\)

r₁ + r₂ + r₃ + ... + r_n-2 + r_n \(=-\ \frac{a\ n-2}{an-1}\)

r₁ + r₂ + r₃ + ... + r_n-3 + r_n \(=-\ \frac{a\ n-3}{a\ 3}\)

r₁ + r₂ + r₃ + ... + r_n-2 + r_n \(=-\ \frac{a\ n-2}{a\ \ n}\)

r₁ + r₂ + r₃ + ... + r_n-1 + r_n \(=-\ \frac{a\ n}{a\ }\)