\(y'=-\frac{4}{x^3}+\frac{1}{2\left(x-1\right)^2}=0\)
\(\Leftrightarrow x^3-8\left(x-1\right)^2=0\)
\(\Leftrightarrow x^3-8x^2+16x-8=0\)
\(\Leftrightarrow\left(x-2\right)\left(x^2-6x+4\right)=0\)
\(\Rightarrow x=3-\sqrt{5}\)
\(f\left(x\right)_{min}=f\left(3-\sqrt{5}\right)=\frac{11+5\sqrt{5}}{4}\)