题型:解答题 题类:其他 难易度:易
已知等比数列\(\left\{ {{a}_{n}} \right\}\)的公比\(q > 1\),且满足:\({{a}_{2}}+{{a}_{3}}+{{a}_{4}}=28\),且\({{a}_{3}}+2\)是\({a}_{2},{a}_{4} \)的等差中项.
\((1)\)求数列\(\left\{ {{a}_{n}} \right\}\)的通项公式;
\((2)\)若数列\({{b}_{n}}={{\log }_{2}}{{a}_{n{+}5}}\),且数列\(\left\{ {{b}_{n}} \right\}\)的前\(n\)项的和为\({{S}_{n}}\),求数列\(\left\{ \dfrac{{{S}_{n}}}{n} \right\}\)的前\(n\)项的和为\({{T}_{n}}\).