5.
\((1)\)已知\(a=\int_{\frac{1}{e}}^{e}{\dfrac{1}{x}}dx\),则二项式\({{(1-\dfrac{a}{x})}^{5}}\)的展开式中\({{x}^{-3}}\)的系数为__________.
\((2)\)如图,对图中\(5\)个区域涂色,有\(4\)种不同的颜色可供选择,要求每个区域涂一种颜色,相邻的区域不能涂相同的颜色,则不同的涂色种数为________.
\((3)\)若\(f(n)\)为\({{n}^{2}}+1(n\in {{N}^{*}})\)的各位数字之和,如\({{14}^{2}}+1=197,{ 1}+{9}+{7}={17,}\)则\(f(14)=17\)记\({f}_{1}\left(n\right)=f\left(n\right),{f}_{2}\left(n\right)=f\left({f}_{1}\left(n\right)\right),{f}_{3}\left(n\right)=f\left({f}_{2}\left(n\right)\right),…{f}_{k+1}\left(n\right)=f\left({f}_{k}\left(n\right)\right) \),\(k\in {{N}^{*}}\)则\({{f}_{2018}}(9)=\)__________.
\((4)\)已知函数\(f\left( x \right)=\ln x-a{{x}^{2}}+x\)有两个不同的零点,则\(a\)的范围 ________.