\((1)\)曲线经过点\((2 \sqrt{2},1) \),其一条渐近线方程为\(y= \dfrac{1}{2}x \),该双曲线的标准方程为_________.
\((2)D\)为\(\triangle ABC\)的边\(BC\)上一点,\(\overrightarrow{DC}=-2\overrightarrow{DB}\),过\(D\)点的直线分别交直线\(AB\)、\(AC\)于\(E\)、\(F\),若\(\overrightarrow{AE}=λ\overrightarrow{AB}\),\(\overrightarrow{AF}=μ\overrightarrow{AC}\),其中\(λ > 0\),\(μ > 0\),则\( \dfrac{2}{λ}+ \dfrac{1}{μ}=\)________.
\((3)\)已知向量\(\overrightarrow{AB}\),\(\overrightarrow{AC}\),\(\overrightarrow{AD}\)满足\(\overrightarrow{AC}=\overrightarrow{AB}+\overrightarrow{AD}\),\(|\overrightarrow{AB}|=2\),\(|\overrightarrow{AD}|=1\),\(E\),\(F\)分别是线段\(BC\),\(CD\)的中点,若\(\overrightarrow{DE}·\overrightarrow{BF}=- \dfrac{5}{4}\),则向量\(\overrightarrow{AB}\)与\(\overrightarrow{AD}\)的夹角为________.
\((4)\)已知数列\(\left\{ {{a}_{n}} \right\}\)中,\({{a}_{1}}=1,{{a}_{n+1}}=2{{a}_{n}}+n-1\left( n\in {{N}^{*}} \right)\),则其前\(n\)项和\({{S}_{n}}{=}\)_________.