Question

mở ngoặc x trừ 2017 đóng ngoặc mũ 2020 bằng 1 

 

Answer 1

(x-2017)^2020=1 x-2017=-1=>x=2016

=>x-2017=1

=>x=2018

kl x=2018 hoac x=2016

Answer 2

\(\left(x-2017\right)^{2020}=1\)

\(\Leftrightarrow\left(x-2017\right)^{2020}=1^{2020}\)

\(\Leftrightarrow x-2017=\pm1\)

\(\Leftrightarrow\orbr{\begin{cases}x-2017=1\\x-2017=-1\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=2018\\x=2016\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}x=2018\\x=2016\end{cases}}\)