Vì (x + 1)2 \(\ge\) với mọi x
Dấu '' = '' xảy ra \(\Leftrightarrow\) \(\sqrt{25-\left(x+1\right)^2}+2016\ge2016\)
\(\Rightarrow\)\(\sqrt{25-\left(x+1\right)^2}=0\)
\(\Rightarrow25-\left(x+1\right)^2=0\)
\(\Rightarrow\left(x+1\right)^2=25\)
\(\Rightarrow\orbr{\begin{cases}x+1=25\\x+1=-25\end{cases}}\)\(\Rightarrow\orbr{\begin{cases}x=24\\x=-26\end{cases}}\)
Vậy GTLN của \(\sqrt{25-\left(x+1\right)^2}+2016\) \(\Leftrightarrow\orbr{\begin{cases}x=24\\x=-26\end{cases}}\)