How do you calculate $log_9 48$ with a calculator?

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Answer 1 · 2017-12-10T08:46:02

Use the change of base formula with $log$ or $ln$ ...

You can use the change of base formula for logarithms:

$log_b a = log_c a / log_c b$

with $c=10$ (common logarithm) or $c=e$ (natural logarithm):

$log_9 48 = log 48 / log 9 ~~ 1.681241237 / 0.954242509 ~~ 1.761859507$

$log_9 48 = ln 48 / ln 9 ~~ 3.871291911 / 2.197224577 ~~ 1.761859507$

How do you calculate log_9 48log_9 48 with a calculator?