7.
设数列\(\{{{a}_{n}}\}\)是公差大于\(0\)的等差数列,\({{S}_{n}}\)为数列\(\{{{a}_{n}}\}\)的前\(n\)项和\(.\)已知\({{S}_{3}}=9\),且\(2{{a}_{1}}\),\({{a}_{3}}-1\),\({{a}_{4}}+1\)构成等比数列.
\((1)\)求数列\(\{{{a}_{n}}\}\)的通项公式;
\((2)\)若数列\(\{{{b}_{n}}\}\)满足\(\dfrac{{{a}_{n}}}{{{b}_{n}}}={{2}^{n-1}}(n\in {{N}^{*}})\),设\({{T}_{n}}\)是数列\(\{{{b}_{n}}\}\)的前\(n\)项和,证明\({{T}_{n}} < 6\).
\((3)\)数列\(\{ c_{n}\}\)满足:\(c_{1}{=}2\),\(c_{n{+}1}{=}3c_{n}{-}2n{+}1\),求数列\(\{ c_{n}\}\)的通项公式。