9.
已知数列\(\left\{{a}_{n}\right\} \)是首项为\({a}_{1}= \dfrac{1}{4} \),公比\(q= \dfrac{1}{4} \)的等比数列,设\({{b}_{n}}+2=3{{\log }_{\frac{1}{4}}}{{a}_{n}}(n\in N*)\),数列\(\left\{{c}_{n}\right\} \)满足\({c}_{n}={a}_{n}·{b}_{n} \)。
\((1)\)求证:\(\{{{b}_{n}}\}\)是等差数列;
\((2)\)求数列\(\{{{c}_{n}}\}\)的前\(n\)项和\({{S}_{n}}\);
\((3)\)若\({c}_{n}\leqslant \dfrac{1}{4}{m}^{2}+m-1 \)对一切正整数\(n\)恒成立,求实数\(m\)的取值范围。