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I have got a Casio fx-82MS calculator, and I want to calcuate various logarithms with it, especially $\log₂(x)$-style logarithms. Unfortunately, its user interface contains buttons for just $\ln$ and $\log₁₀$.

How to do it with the existing set of buttons/commands?

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    Use change of base property of a logarithm?2012-03-15
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    $\log_a x={\ln x\over\ln a}$.2012-03-15
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    @Nunoxic, wow, is it possible? I'll search this function. David Mitra, your solution is great for me.2012-03-15

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