\(C=\dfrac{x}{\sqrt{x}+x}+\dfrac{\sqrt{x}-1}{x-1}\) (\(x>0,x\ne1\))
\(C=\dfrac{x}{\sqrt{x}\left(\sqrt{x}+1\right)}+\dfrac{\sqrt{x}-1}{\left(\sqrt{x}-1\right)\left(\sqrt{x}+1\right)}\)
\(C=\dfrac{\sqrt{x}\cdot\sqrt{x}}{\sqrt{x}\left(\sqrt{x}+1\right)}+\dfrac{1}{\sqrt{x}+1}\)
\(C=\dfrac{\sqrt{x}}{\sqrt{x}+1}+\dfrac{1}{\sqrt{x}+1}\)
\(C=\dfrac{\sqrt{x}+1}{\sqrt{x}+1}\)
\(C=1\)