\[1)\ {2,5}^{1 - x} > {2,5}^{- 3x}\]
\[1 - x > - 3x\]
\[2x > - 1\]
\[x > - 0,5.\]
\[Ответ:\ \ x \in ( - 0,5;\ + \infty).\]
\[2)\ {0,13}^{x - 4} \geq {0,13}^{2 - x}\]
\[x - 4 \leq 2 - x\]
\[2x \leq 6\]
\[x \leq 3.\]
\[Ответ:\ \ x \in ( - \infty;\ 3\rbrack.\]
\[3)\ \left( \frac{4}{3} \right)^{2x} \leq \left( \frac{3}{4} \right)^{x - 1}\]
\[\left( \frac{3}{4} \right)^{- 2x} \leq \left( \frac{3}{4} \right)^{x - 1}\]
\[- 2x \geq x - 1\]
\[- 3x \geq - 1\]
\[x \leq \frac{1}{3}.\]
\[Ответ:\ \ x \in \left( - \infty;\ \frac{1}{3} \right\rbrack.\]
\[4)\ 3^{- 4x} > \sqrt{3}\]
\[3^{- 4x} > 3^{\frac{1}{2}}\]
\[- 4x > \frac{1}{2}\]
\[x < - \frac{1}{8}.\]
\[Ответ:\ \ x \in \left( - \infty;\ - \frac{1}{8} \right).\]