9.
\((1)\)当\(x=2\)时,代数式\(a{{x}^{3}}+bx+5\)的值为\(9\),那么当\(x=-2\)时,该代数式的值是 。
\((2)\)如果\({{\left( x+n \right)}^{2}}={{x}^{2}}+\left( m+2 \right)x+4\),则\(m\)的值为 。
\((3)\)已知\(\angle A\)的两边和\(\angle B\)的两边分别平行,且\(\angle A\)比\(\angle B\)的\(3\)倍少\(20{}^\circ \),则\(\angle B=\) \({\,\!}^{\circ}\)。
\((4)\)如图,\(\triangle ABC\)中,\(∠A=α^{\circ}\),延长\(BC\)到\(D\),\(∠ABC\)与\(∠ACD\)的平分线相交于点\(A_{1}\),\(∠A_{1}BC\)与\(∠A_{1}CD\)的平分线相交于点\(A_{2}\),依此类推,\(∠A_{n-1}BC\)与\(∠A_{n-1}CD\)的平分线相交于点\(A_{n}\),则\(∠A_{n}\)的度数为 \({\,\!}^{\circ}.\)
\((5)\)已知\(\triangle ABC\)的面积为\(1\),把它的各边延长一倍得\(\triangle A_{1}B_{1}C_{1}\);再\(\triangle A_{1}B_{1}C_{1}\)的各边延长两倍得\(\triangle A_{2}B_{2}C_{2}\);在\(\triangle A_{2}B_{2}C_{2}\)的各边延长三倍得\(\triangle A_{3}B_{3}C_{3}\),\(\triangle A_{3}B_{3}C_{3}\)的面积为 .