\((1)\)若幂函数\(f(x)\)的图象过点\((3,{ }\dfrac{1}{9})\),则\(f(x)=\)__________.
\((2)\)函数\(f\left( x \right){=}x^{2}{+}{mx}{-}1\)在\([-1,3]\)上是单调函数,则实数\(m\)的取值范围是____.
\((3)\)按下面流程图的程序计算,若开始输入\(x\)的值是\(4\),则输出结果\(x\)的值是________.
\((4).\)若正数\(x,y\)满足\(\dfrac{1}{x}+\dfrac{1}{y}=1\),则\(\dfrac{1}{x-1}+\dfrac{3}{y-1}\)的最小值为。