Tui bik làm tới đây thôi
$\begin{array}{l}
\begin{array}{*{20}{l}}
{\sqrt[3]{{2015}} + \sqrt[5]{{2015}} + \sqrt[7]{{2016}} + \sqrt[9]{{2016}}}\\
{22.50480876}\\
{Ans - 22.50480870 = 5.53451214*{{10}^{ - 8}}}
\end{array}\\
Ans - 5.53451210*{10^{ - 8}} = 4.02*{10^{ - 16}}\\
Ans - 4.00*{10^{ - 16}} = 2*{10^{ - 18}}\\
22.504808755345121402
\end{array}$
