\( \frac{\log_85}{\log_89}= \)
\( \log_95 \)
\( \log_59 \)
\( \log_74= \)
\( \frac{\ln4}{\ln7} \)
\( \frac{\log_57}{\log_47} \)
\( \frac{\log_{4x}9}{\log_{4x}a}= \)
\( \log_a9 \)
\( \log_{4x}\frac{9}{a} \)
\( \frac{\log_9e^2}{\log_9e}= \)
\( e \)
\( 2 \)
\( \frac{\log_89a}{\log_83a}= \)
\( \log_{9a}3a \)
\( \log_{3a}9a \)
log85log89= \frac{\log_85}{\log_89}= log89log85=
log95 \log_95 log95
log74= \log_74= log74=
ln4ln7 \frac{\ln4}{\ln7} ln7ln4
log4x9log4xa= \frac{\log_{4x}9}{\log_{4x}a}= log4xalog4x9=
loga9 \log_a9 loga9
log9e2log9e= \frac{\log_9e^2}{\log_9e}= log9elog9e2=
2 2 2
log89alog83a= \frac{\log_89a}{\log_83a}= log83alog89a=
log3a9a \log_{3a}9a log3a9a
\( \ln4x= \)
\( \frac{\log_74x}{\log_7e} \)
\( \frac{\log_74x}{\ln7} \)
ln4x= \ln4x= ln4x=
log74xlog7e \frac{\log_74x}{\log_7e} log7elog74x