Find the value of lim n → ∞ a n {\displaystyle \lim _{n\rightarrow \infty }a_{n}} to help you evaluate the limit lim n → ∞ | a n + 1 a n | {\displaystyle \lim _{n\rightarrow \infty }\left|{\frac {a_{n+1}}{a_{n}}}\right|} appearing in the ratio test.
