Question about Casio FX-300MS Calculator

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Casio FX-100AU Is there something wrong with my calculator? Trying to use the log function... what sequence do I press to solve... 20log (2/10mv) to get the textbook answer of 46db? Thanks

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Just input #20 then press log button then (2/10 shift 5 (m)) so it will look like 20log (2/10m) = 46.02

Posted on Sep 23, 2008

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How do i calculate antilog on my casio fx-991 ES calculator? Urgent! Have a paper tomorrow!


For common logs (logs in base 10) use the 10^x function : Press [SHIFT] [Log] to access it.
For natural logs, use the exponential function. Press [SHIFT][ln] to access it.

Dec 03, 2010 | Casio FX-115ES Scientific Calculator

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How do you do an antilog problem on a casio fx-300?


For common logs (logs in base 10) use the 10^x function : Press [SHIFT] [Log] to access it.
For natural logs, use the exponential function. Press [SHIFT][ln] to access it.

Nov 29, 2010 | Casio FX-300MS Calculator

1 Answer

How to use antilog by casio fx-82es


The inverse of the log function is the function 10^
antilogarithm of (x)=10^(x)
The function shares the same physical key as the [LOG] function. To access it you press [SHIFT][LOG].

The antilogarithm of the natural log [LN] is the exponential function [e^x]. It shares the same physical key with the [LN] function. To access it press [SHIFT][LN]

Aug 29, 2010 | Casio FX-300MS Calculator

1 Answer

How to use log values in calculators


You have two keys [LN] and [LOG], the former to calculate the natural logarithms and the latter to calculate the logarithms in base 10. You press the appropriate function key then type in the value. No need to press the [=] sign.
In case you are wondering: these functions have inverses: the inverse function of [LN] is the exponential, accessed with the key sequence [SHIFT][LN]; the inverse function of the logarithm in base 10 is "raise to to a power", accessed with the key sequence [SHIFT][LOG].
I am enclosing a screen capture from the user's manual. It shows you several examples.
4cdf547.jpg

Aug 24, 2010 | Casio FX-300MS Calculator

1 Answer

How to find nth root using Casio FX-83ES


You use the power root function key accessible with the key sequence [SHIFT][X ^]. I am inserting a screen capture from the manual to show you the sequence.

On the third line of the capture (power root) is the key you must press. In the small rectangle to the left of the radical sign you enter the order of the root: 2 for square root, 3 for cube root, 4 for 4th root and son on.

To calculate the decimal log you use the [LOG] key as shown on capture. For natural log (ln), use the [LN] key. The argument (2/3) in your example should be enclosed inside the parentheses.
752d920.jpg

Jun 04, 2010 | Casio fx-300ES Calculator

1 Answer

Trying to get the inverse of a matrix


Hello,

The error may be due to the key you used to signifie inverse. It says in the manual that you should use the key x^-1 not the one used to input general powers.
Here is screen capture from the Appendix to the manual. The picture shows the sequence of keys to press to obtain the inverse of a 2x2 matrix. It is taken from page 41 of Appendix

moz-screenshot-1.pngd2bc4ab.jpg
The matrix used in the exemple is
a_11=2 a_12=1 a_21=1 a_22=2
Here is the link to download the manual and the appendix

http://support.casio.com/manualfile.php?rgn=1&cid=004001004

Hope it helps

Jul 13, 2009 | Casio FX-115ES Scientific Calculator

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How to go back to calculations i did before ??? on CASIO fx-100AU....please elp some thing wrong with my calculator...


Hello,
If you have the Replay button, you can go back, as long as you did not turn off calculator. There is a limit on how far back you can go.
Hope it helps.

Mar 28, 2009 | Casio FX-300MS Calculator

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