10.
\((1)\)已知数列\(\{a_{n}\}\)的前\(n\)项和为\(S_{n}\),且\(S_{n}=n^{2}+1\),则 \(a_{n=\_\_\_\_\_\_\_\_\_\_\_\_\_}\)
\((2)\) 已知直三棱柱\(ABC-{{A}_{1}}{{B}_{1}}{{C}_{1}}\)的\(6\)个顶点都在球\(O\)的球面上,若\(AB=3\),\(AC=4\),\(AB\bot AC\),\(A{{A}_{1}}=12\),则球\(O\)的表面积为________
\((3)\)已知实数\(a > 0\),\(b > 0\),\(\sqrt{2} \)是\(8^{a}\)与\(2^{b}\)的等比中项,则\(\dfrac{1}{a}+ \dfrac{2}{b} \)的最小值是______.
\((4)\)若当\(x∈[1,3]\),\(y∈[2,4]\)时,\(\dfrac{a{{x}^{2}}+2{{y}^{2}}}{xy}-1 > 0\)恒成立,则\(a\)的取值范围是______