2.
\((1)\)如果抛物线\(y=\left(m-1\right){x}^{2} \)的开口向上,那么\(m\)的取值范围是_____________.
\((2)\)已知二次函数\(y=ax^{2}+bx-1(a\neq 0)\)的图象经过点\((1,1)\),则代数式\(3-a-b\)的值为_____.
\((3)\)抛物线\(y{=}2x^{2}{-}12x{-}16\)的对称轴是_________________________.
\((4)\)把抛物线\(y=\dfrac{1}{2}{{\left( x-1 \right)}^{2}}+2\)向左平移\(1\)个单位,再向下平移\(2\)个单位,则所得抛物线的解析式为____________________________.
\((5)\)抛物线\(y=x^{2}-6x+5\)的顶点坐标为________________\(.\)
\((6)\)如图,直线\(y =mx+n\)与抛物线\(y=ax^{2}+bx+c\)交于\(A(-1,p)\),\(B(4,q)\)两点,则关于\(x\)的不等式\(mx+n > ax^{2}+bx+c\)的解集是_____________.
\((7)\)如图,是一座抛物线形拱桥,当水面的宽为\(12m\)时,拱顶离水面\(4m\),当水面下降\(2m\)时,水面的宽为__________\(m\).
\((8)\)已知二次函数\(y{=}x^{2}{-}2mx(m{为常数})\),当\({-}1{\leqslant }x{\leqslant }2\)时,函数值\(y\)的最小值为\({-}2\),则\(m\)的值是______________.