Ta có: \(f\left(x\right)=\dfrac{2\sqrt{x}+m}{\sqrt{x+1}}\left(x\ge0\right)\)
\(\Rightarrow\)\(f'\left(x\right)=\dfrac{2.\dfrac{\sqrt{x+1}}{2\sqrt{x}}-\left(\sqrt{x}+m\right).\dfrac{1}{2\sqrt{x+1}}}{x+1}\)
\(\Rightarrow f'\left(x\right)=\dfrac{\dfrac{\sqrt{x+1}}{\sqrt{x}}-\dfrac{\sqrt{x}+m}{2\sqrt{x+1}}}{x+1}\)