Знатоки логарифмов!!![tex] 12. \frac{1}{ log_{8} 0,75} - \frac{1}{ log_{6} 0,75} + log_{ \sqrt{2} } 0,5=???
13. \frac{ log_{ \sqrt[3]{2} } 28}{ log_{32}2 } - \frac{ log_{ \sqrt[5]{2} } 7}{ log_{8} 2} =???[/tex]

121/log(8)0,75=log(0,75)81/log(3)0,75=log(0,75)6log(√2)0,5=-2log(0,75)8-log(0,75)6-2=log(3/4)4/3 -2=-1-2=-313Перейдем к основанию 2(log(2)7+2)*log(2)32/log(2)∛2=5(log(2)7+2):1/3=15(log(2)7+2)log(2)7*log(2)8/log(2)(2^1/5)=3log(2)7:1/5=15log(2)715(log(2)7+2)-15log(2)7=15log(2)7+30-15log(2)7=30