9.
已知函数\(f\)\((\)\(x\)\()=\)\(ax\)\({\,\!}^{2}-(2\)\(a\)\(+1)\)\(x\)\(+2\ln \) \(x\)\((\)\(a\)\(∈R)\).
\((1)\)若曲线\(y\)\(=\)\(f\)\((\)\(x\)\()\)在\(x\)\(=1\)和\(x\)\(=3\)处的切线互相平行,求\(a\)的值;
\((2)\)求\(f\)\((\)\(x\)\()\)的单调区间;
\((3)\)设\(g\)\((\)\(x\)\()=\)\(x\)\({\,\!}^{2}-2\)\(x\),若对任意\(x\)\({\,\!}_{1}∈(0,2]\),均存在\(x\)\({\,\!}_{2}∈(0,2]\),使得\(f\)\((\)\(x\)\({\,\!}_{1}) < \)\(g\)\((\)\(x\)\({\,\!}_{2})\),求\(a\)的取值范围.