\((1)\) 已知向量\(\overrightarrow{m}{=}(t{+}1{,}1){,}\overrightarrow{n}{=}(t{+}2{,}2)\),若\((\overrightarrow{m}{+}\overrightarrow{n}){⊥}(\overrightarrow{m}{-}\overrightarrow{n})\),则\(t\)的值为______.
\((2)\) 已知\(2x{+}3y{=}6\),则\(4^{x}{+}8^{y}\)的最小值为______ .
\((3)\) 抛物线\(x^{2}{=}2{py}(p{ > }0)\)的焦点为\(F\),其准线与双曲线\(x^{2}{-}y^{2}{=}1\)相交于\(A{,}B\)两点,若\({\triangle }{ABF}\)为等边三角形,则\(p{=}\)______ .
\((4)\)若平面区域\(\begin{cases} x{+}y{-}3{\geqslant }0 \\ 2x{-}y{-}3{\leqslant }0 \\ x{-}2y{+}3{\geqslant }0 \end{cases}\)夹在两条平行直线之间,且这两条平行直线间的最短距离为\(\sqrt{2}\),那么这两条平行直线的斜率是______.