1.
已知抛物线\(E\):\(y^{2}=4x\)的焦点为\(F\),过点\(F\)的直线\(l\)与抛物线交于\(A\),\(B\)两点,交\(y\)轴于点\(C\),\(O\)为坐标原点.
\((1)\)若\(k_{OA}+k_{OB}=4\),求直线\(l\)的方程;
\((2)\)线段\(AB\)的垂直平分线与直线\(l\),\(x\)轴,\(y\)轴分别交于点\(D\),\(M\),\(N\),求\(\dfrac{{S}_{\triangle NDC}}{{S}_{\triangle FDM}} \)的最小值.