Question:
How do i get log2 (log base 2) on my sharp EL-509V calculator?
xaveria_neo
2006-11-25 10:53:40 UTC
How do i get log2 (log base 2) on my sharp EL-509V calculator?
Six answers:
Jim Burnell
2006-11-25 11:04:34 UTC
You can calcuate log to any base easily using the change of base formula.



log base n of b = (log base 10 of b) / (log base 10 of n)



so to calculate log base 2 of 16, for example, divide log 16 by log 2, and you should get 4.



You can also use ln instead of log. It works either way.
alnitaka
2006-11-25 11:05:06 UTC
Let x be the number to take the binary log of. I am not familiar with the EL509V, but this should work for any calculator that has any kind of a log on it.



Compute log (2). Save it using the M+ key.

Compute log (x). Divide it by log (2) by hitting divide, MR, =.



The result is log2 (x). It does not matter the base of the logs I use in this - you can use e or 10 or anything for which there are buttons on the calculator for.



This is because log2(x) = log(x)/log(2) for logs to any base b, provided b > 1.
2006-11-25 11:08:17 UTC
I saw an image of this calculator on Google and it does have a log function. It's base 10, but as others said, you can convert log base 2 of x to log of x over log of 2. I don't own one, but my guess is that you should type something along the lines of



log(x)/log(2)



into your calculator, where x is what you wanted to find the log2 of.
tien
2016-10-04 12:50:42 UTC
Log2 Calculator
modulo_function
2006-11-25 11:02:29 UTC
Most calculators only give you base e and base 10 logs.



For other bases, use this:



x = x

2^(log2(x)) = 10^(log10(x)) , see what I've done?



Now you can solve for log2(x) by converting 2 into 10^log10(2)



10^(log10(2)*log2(x)) = 10^(log10(x))

log10(2)*log2(x) = log10(x)



log2(x) = log10(x)/log10(2)



That's pretty long winded by the final result works.
Just me
2006-11-25 11:01:54 UTC
u can only get log to the base 10 or natural log (ln) on ur calculator.


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