8.
已知函数\(f(x)={a}^{2}x- \dfrac{1}{x}-2a\ln ax+ \dfrac{1}{2} \),\(f(x)\)为其导函数.
\((1)\)设\(g(x)=f(x)+\dfrac{1}{x}\),求函数\(g(x)\)的单调区间;
\((2)\)若\(a > 0\) ,设\(A({{x}_{1}},f({{x}_{1}}))\),\(B({{x}_{2}},f({{x}_{2}}))\)为函数\(f(x)\)图象上不同的两点,且满足\(f({{x}_{1}})+f({{x}_{2}})=1\),设线段\(AB\)中点的横坐标为\({{x}_{0}},\)证明:\(a{{x}_{0}} > 1\) .