Question about Casio FX991MS Scientific Calculator
And can we find log with different base other than 10 like 2 or 5 or something else??
Use one of the relations
Posted on Apr 23, 2014
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Posted on Jan 02, 2017
In any scientific calculator log2(n) can be calculated with either ln or log function as
Log2(n)= ln(n) / ln(2)
Log2(n)=log(n) / log(2)
both will give nearly the same answers
Posted on Apr 24, 2009
Your calculator knows only the decimal logarithms log or log_10 and the natural logarithms (ln or log in base e).
So you cannot compute directly the logarithms in any bases other than 10 and e.
A workaround consists in using the relation
log in base b of a number a (log_b (a))
log_b(a)= (log_10(a) ) / (log_10 (b))
or the relation
log_2(0.3)=log(0.3)/log(2) where log is log in base 10
As to the multiplicative factor you had at the beginning of your expression, just multiply the value obtained by one on the formulas above (both formulas will give the same result) by 0.3
Posted on Jul 24, 2010
SOURCE: How do I do logs
Most calculators can't do logs in different bases, but you can solve for the answer this way:
Let's say you need to take the log of 5 in base 3. This can also be written as log5 (base 10)/log3 (base 10).
A more technical solution can be found here: http://oakroadsystems.com/math/loglaws.htm#NewBase
Posted on May 25, 2011
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