ОДЗ : x > 0
Так как 0 < 2/5 < 1 , то :
-1\\\\x<(\frac{2}{5})^{-1}\\\\x<\frac{5}{2}\\\\x<2,5\\\\Otvet:\boxedx\in(0;2,5)" alt="log_{\frac{2}{5}}x>-1\\\\x<(\frac{2}{5})^{-1}\\\\x<\frac{5}{2}\\\\x<2,5\\\\Otvet:\boxedx\in(0;2,5)" align="absmiddle" class="latex-formula">