Odpowiedź:
[tex] log_{2.5}( \frac{8}{125} ) = log_{ \frac{5}{2} }( \frac{125}{8} ) {}^{ - 1} = log_{ \frac{5}{2} }(( \frac{5}{2} {)}^{3} {)}^{ - 1} = log_{ \frac{5}{2} }( { \frac{5}{2} }^{ - 3} ) = - 3[/tex]
[tex] log_{ \frac{1}{4} }( \sqrt[3]{2} ) = log_{ {4}^{ - 1} }( {2}^{ \frac{1}{3} } ) = log_{ {2}^{ - 2} }( {2}^{ \frac{1}{3} } ) = - \frac{1}{6} [/tex]
