1.
设\(M⊆N^{+}\),正项数列\(\{a_{n}\}\)的前\(n\)项的积为\(T_{n}\),且\(∀k∈M\),当\(n > k\)时,\( \sqrt {T_{n+k}T_{n-k}}=T_{n}T_{k}\)都成立.
\((1)\)若\(M=\{1\}\),\(a_{1}= \sqrt {3}\),\(a_{2}=3 \sqrt {3}\),求数列\(\{a_{n}\}\)的前\(n\)项和;
\((2)\)若\(M=\{3,4\}\),\(a_{1}= \sqrt {2}\),求数列\(\{a_{n}\}\)的通项公式.