Cho \({{u}_{n}}=\dfrac{1-4n}{5n}\). Khi đó \(\lim...

Câu hỏi: Cho \({{u}_{n}}=\dfrac{1-4n}{5n}\). Khi đó \(\lim {{u}_{n}}\) bằng?

A \(\dfrac{1}{5}.\)

B \(-\dfrac{4}{5}.\)

C  \(\dfrac{4}{5}.\)

D  \(-\dfrac{1}{5}.\)