Giải các bất phương trình :
$\begin{array}{l}
1)\,\,\,\,\,{\log _{\frac{1}{7}}}\left( {x + 2} \right)\left( {4 - x} \right) + \frac{1}{2}{\log _{\sqrt
7 }}\left( {4 - x} \right) > - 2{\log _{49}}8\\
2)\,\,\,\,\log \,_9^2x > {\log _3}x.{\log _3}\left( {\sqrt {2x + 1} - 1} \right)\\
3)\,\,\,\,{x^{{{\log }_2}\left( {x + 14} \right)}} + {\log _2}\left( {x + 2} \right) \le {x^6}
\end{array}$
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