\(A=\frac{2}{2-x}+\frac{1}{x}=\frac{ax}{2-x}+\frac{b\left(2-x\right)}{x}+c\Rightarrow a=1;b=\frac{1}{2};c=\frac{3}{2}\)
\(A=\frac{x}{2-x}+\frac{\left(2-x\right)}{2x}+\frac{3}{2}\ge2\sqrt{\frac{x}{2-x}.\frac{2-x}{2x}}+\frac{3}{2}=\sqrt{2}+\frac{3}{2}\)
\(MinA=\frac{3}{2}+\sqrt{2}\) khi 2x2 = (2-x)2 => x =...