8.
已知数列\(\left\{{a}_{n}\right\} \)的前\(n\)项和为\({S}_{n} \),向量\( \overset{⇀}{a}=\left({S}_{n}\;,\;1\right) \),,满足条件\( \overset{⇀}{a}/\!/ \overset{⇀}{b} \).
\((1)\)求数列\(\left\{{a}_{n}\right\} \)的通项公式;
\((2)\)设函数\(f\left(x\right)={\left( \dfrac{1}{2}\right)}^{x} \),数列\(\left\{{b}_{n}\right\} \)满足条件\({b}_{1}=1 \),\(f\left({b}_{n+1}\right)= \dfrac{1}{f\left(-{b}_{n}-1\right)} \).
\(①\)求数列\(\left\{{b}_{n}\right\} \)的通项公式;
\(②\)设\({c}_{n}= \dfrac{{b}_{n}}{{a}_{n}} \),求数列\(\left\{{c}_{n}\right\} \)的前\(n\)项和\({T}_{n} \).