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How do you input -log ? - Casio FX-260 Calculator

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Use the log function (common logarithm). See screen capture for markings on key.
how do you input -log ? - 83c0b62.jpg
To evaluate the negative of a logarithm
Enter the number (argument) of the logarithm
Press the = key to have it calculated.
While result is still displayed, press the sign change key or (+/-).

Beware that -log(number) is not necessarily a negative value.

Another way to calculate -log is to use the relation
log(1/a)=-log(a) .

Posted on Jun 22, 2010

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To solve the problem using log


Look the calculators has a default base 10 and you can't change it but you may learn this:
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