\((1)\)有\(6\)张正面分别标有数字\(-2\),\(-1\),\(0\),\(2\),\(4\),\(6\)的不透明卡片,它们除数字不同外其余全部相同,现将它们背面朝上,洗匀后从中任取一张,将该卡片上的数字记为\(a\),则使关于\(x\)的不等式\(\begin{cases}2x > 3x-3 \\ 3x-a > 5\end{cases} \)有实数解的概率为_____.
\((2)\)如图已知\(A_{1}\),\(A_{2}\),\(A_{3}\),\(…A_{n}\)是\(x\)轴上的点,且\(OA_{1}=A_{1}A_{2}=A_{2}A_{3}=A_{3}A_{4}=…=A_{n-1}A_{n}=1\),分别过点\(A_{1}\),\(A_{2}\),\(A_{3}\),\(…A_{n′}\)作\(x\)轴的垂线交二次函数\(y= \dfrac{1}{2} x^{2}(x > 0)\)的图象于点\(P_{1}\),\(P_{2}\),\(P_{3}\),\(…Pn\),若记\(\triangle OA_{1}P_{1}\)的面积为\(S_{1}\),过点\(P_{1}\)作\(P_{1}B_{1}⊥A_{2}P_{2}\)于点\(B_{1}\),记\(\triangle P_{1}B_{1}P_{2}\)的面积为\(S_{2}\),过点\(P_{2}\)作\(P_{2}B_{2}⊥A_{3}P_{3}\)于点\(B_{2}\),记\(\triangle P_{2}B_{2}P_{3}\)的面积为\(S_{3}\),\(…\)依次进行下去,最后记\(\triangle P_{n-1}B_{n-1}P_{n}(n > 1)\)的面积为\(S_{n}\),则\(S_{n}=\)_____.
\((3)\)如图,矩形\(OABC\)的顶点\(A\)、\(C\)分别在\(x\)、\(y\)轴的正半轴上,点\(D\)为对角线\(OB\)的中点,点\(E(4,n)\)在边\(AB\)上,反比例函数\(y= \dfrac{k}{x} (k\neq 0)\)在第一象限内的图象经过点\(D\)、\(E\),且\(\tan ∠BOA= \dfrac{1}{2} .\)若反比例函数的图象与矩形的边\(BC\)交于点\(F\),将矩形折叠,使点\(O\)与点\(F\)重合,折痕分别与\(x\)、\(y\)轴正半轴交于点\(H\)、\(G\),则线段\(OG\)的长为_____.
\((4)\)如图,已知点\(A(-2,0)B(4,0)\),直线\(l:y=- \dfrac{ \sqrt{3}}{3} x+ b\)经过\(B\)和点\(C\),且点\(C\)的横坐标为\(-5\),设\(D\)为线段\(BC\)上一点\((\)不含端点\()\),连接\(AD\),一动点\(M\)从点\(A\)出发,沿线段\(AD\)以每秒\(1\)个单位的速度运动到\(D\),再沿线段\(DC\)以每秒\(2\)个单位的速度运动到\(C\)后停止,当点\(D\)的坐标__________时,点\(M\)在整个运动过程中用时最少.