How do i get log2 (log base 2) on my sharp EL-509V calculator?

Question

How do i get log2 (log base 2) on my sharp EL-509V calculator?

Answer 1

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.

Answer 2

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.

Answer 3

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.

Answer 4

Log2 Calculator

Answer 5

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.

Answer 6

u can only get log to the base 10 or natural log (ln) on ur calculator.