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How to calculate 0,75 log2 0,75=? - Casio FX82MS Scientific Calculator

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Posted on Mar 21, 2011


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ln . 2 5 / ln 2 = or
log . 2 5 / log 2 =

Oct 01, 2013 | Sharp EL-531VB Calculator

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How can I calculate Log2 2.5 on my calculator.. since everytime I start entering it i start by pressing log and right away it says ERROR.. by the way the 2 right after log is suposed to be a little 2.

First of all, to compute the log of a number, enter the number first then press the LOG key.

Second, to compute the log to a base b other than e or 10, use the relationship
logb(x) = log(x) / log(b) = ln(x) / ln(b)
You can use either the common log (log) or the natural log (ln), as long as you're consistent.

So, to calculate log2(2.5), press
2 . 5 log / 2 log =
2 . 5 ln / 2 ln =

Feb 04, 2011 | Texas Instruments TI-30 Xa Solar...

1 Answer

How to type log base 2

You can't. However, you can calculate the log base 2 of any number by calculating

log2(x) = log(x)/log(2) = ln(x)/ln(2)

That is, the log base 2 of any number is the log of that number divided by the log of 2.

Dec 15, 2010 | Casio FX350MS Scientific Calculator

2 Answers

How to write log base 2 in casio fx-82MS

With log a / log b = loga (b) formula

In casio for log2 8 = log8 / log 2 = 3

Mar 24, 2010 | Casio FX-115ES Scientific Calculator

1 Answer


You cannot do it with a single key. Rather you use the relation
log in base a of b = log_a(b)=log(b) /log(a)
So log2 5 =log(5)/log(2)

Feb 26, 2010 | Casio FX-260 Calculator

2 Answers

How do you calculate log in any base

Use Diamond + LN or Diamond+7 to get the decimal log().

use the second argument as the base, for example:

log2(64) = log(64,2)

Feb 13, 2010 | Texas Instruments Voyage 200 Calculator

1 Answer

Log2 x = 2.5

If the Log2 stands for log in base 2.then
2^(log2 x)= 2^(5/2)
But 2^ (log2 x) =x, so solution is x =2^(5/2).
All that is left for you to do is to calculate 2^(5/2) or 2^(2.5) or square root of (2^5) or square root of 32. and you find x.

Sep 28, 2009 | Casio FX-7400G Plus Calculator

1 Answer

Log I do not know how to...

I have finally worked out how to do log to the base 2 on my FX-83ES after nearly 2 years.
I hope yours is a similar problem.

The calculator must be in MATH mode or it will not work.
press the log button as the useless manual says then 2 then the right arrow on the replay button and then the number you want the log2 off..
Hey presto a correct answer

Nov 20, 2008 | Casio FX-250HC Calculator

11 Answers

How to calculate log value in calculator with different base value

In any scientific calculator log2(n) can be  calculated with either ln or log function as follows
Log2(n)= ln(n) / ln(2)
Log2(n)=log(n) / log(2)

both will give nearly the same answers

Dec 08, 2007 | Casio FX-300MS Calculator

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