Question about Casio FX-115ES Scientific Calculator

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I have a Casio fx-82au plus and want to input logs to the base less than 10. Is there a way to do this? eg log to the base of 2 = 16 (answer is 4 but how do we get that to work on this calculator).

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You can calculate the logarithm to any base by using the relationship
logb(x) = log(x)/log(b) = ln(x)/ln(b).

To calculate the log base 2 of 16, either divide the log of 16 by the log of 2 or the ln of 16 by the ln of 2.

Posted on Apr 07, 2011

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A function and its inverse usually share the same physical key. One function is accessed directly, the other by using the SHIFT or 2ndF key.

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