Giải nhanh hộ mk ạ, chi tiết nha Question Giải nhanh hộ mk ạ, chi tiết nha in progress 0 Môn Toán Kiệt Gia 4 years 2020-11-03T22:11:02+00:00 2020-11-03T22:11:02+00:00 1 Answers 81 views 0
Answers ( )
Đáp án:
$\begin{array}{l}
{3^{2020}} + {3^{2019}} – {3^{2018}}\\
= {3^{2018 + 2}} + {3^{2018 + 1}} – {3^{2018}}\\
= {3^{2018}}{.3^2} + {3^{2018}}.3 – {3^{2018}}\\
= {3^{2018}}\left( {{3^2} + 3 – 1} \right)\\
= {3^{2018}}.11 \vdots 11\\
Vay\,\left( {{3^{2020}} + {3^{2019}} – {3^{2018}}} \right) \vdots 11
\end{array}$