lim ( 2018 /2019 ) ^n bằng.5/22\(\lim {\left( {\frac{{2018}}{{2019}}} \right)^n}\) bằng. \(0\).\( + \infty \).\(\frac{1}{2}\).\(2\).Giải thíchA Vì \(\frac{{2018}}{{2019}} < 0\) nên\(\lim {\left( {\frac{{2018}}{{2019}}} \right)^n} = 0\).