7.
填空题
\((1)\)已知点\(P\)\((\)\(x\),\(y\)\()\)的坐标满足条件\(\begin{cases}\begin{matrix}x\geqslant 1 \\ y\geqslant x-1\end{matrix} \\ x+3y-5\leqslant 0\end{cases} \)那么点\(P\)到直线\(3\)\(x\)\(-4\)\(y\)\(-13=0\)的距离的最小值为________.
\((2)\)动点\(P\)\((\)\(a\),\(b\)\()\)在区域\(\begin{cases}\begin{matrix}x+y-2\leqslant 0 \\ x-y\geqslant 0\end{matrix} \\ y\geqslant 0\end{cases} \)上运动,则\(w\)\(= \dfrac{a+b-3}{a-1}\)的取值范围是 .
\((3)\)若变量\(x\),\(y\)满足约束条件\(\begin{cases}x-y+1\leqslant 0 \\ x+2y-8\leqslant 0 \\ x\geqslant 0\end{cases}\),则\(z\)\(=3\)\(x\)\(+\)\(y\)的最小值为________.
\((4)\)将\(53_{(8)}\)转化为二进制的数为
\((5)\)若点\(P\)\((\)\(m\),\(3)\)到直线\(4\)\(x\)\(-3\)\(y\)\(+1=0\)的距离为\(4\),且点\(P\)在不等式\(2\)\(x\)\(+\)\(y\)\( < 3\)表示的平面区域内,则\(m\)\(=\)________.
\((6)\)设直线\(l\)的方程为\(x\)\(+\)\(y\)\(\cos \)\(θ\)\(+3=0(\)\(θ\)\(∈R)\),则直线\(l\)的倾斜角\(α\)的范围是
\((7)\)一条直线\(l\)过点\(P\)\((1,4)\),分别交\(x\)轴,\(y\)轴的正半轴于\(A\)、\(B\)两点,\(O\)为原点,则\(\triangle \)\(AOB\)的面积最小时直线\(l\)的方程为 .