已知\(\{a_{n}\}\)是各项均为正数的等比数列，且\(a_{1}+a_{2}=6\)，\(a_{1}a_{2}=a_{3}\)．
\((1)\)求数列\(\{a_{n}\}\)通项公式；
\((2)\{b_{n}\}\)为各项非零的等差数列，其前\(n\)项和为\(S_{n}\)，已知\(S_{2n+1}=b_{n}b_{n+1}\)，求数列\(\{ \dfrac {b_{n}}{a_{n}}\}\)的前\(n\)项和\(T_{n}\)．