Answer
$\ln 4/\ln 6$ and $\log 4/\log 6$
Work Step by Step
$log_6 4$
$log_6 4=x$
$6^x=4$
$ln (6^x) = ln 4$
$x ln 6 = ln 4$
$x \ln 6/\ln 6 = \ln 4/\ln 6$
$x= \ln 4/\ln 6$
$\ln 4/\ln 6 = \log 4/\log 6$
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