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log base e on calculator?

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    Hi,
    not sure if this question should go here, but it's maths related . Simple question. How do I do Log base E on one of those standard CASIO (fx-83) scientific calculator. I can only get log base 10 (as that's the default). I'm sure it doesn't vary much model to model.
    Thanks
  2. Offline

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    its the ln button (natural log)
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    ln button.
  4. Offline

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    Thanks for the super quick replies! As you can see, I'm not a mathematician by any stretch of the imagination
  5. Offline

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    If you don't have that button, you can always enter

    \dfrac{\log x}{\log e^1}

    (I use e^1 because not all calculators have a e button)
  6. Offline

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    (Original post by SimonM)
    If you don't have that button, you can always enter

    \dfrac{\log x}{\log e^1}

    (I use e^1 because not all calculators have a e button)
    the calculator he said he has does have it included, but good as an alternative

    how would you enter e^1 if you dont have the e button? (might be a stupid question.....)
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    (Original post by laura_beth)
    the calculator he said he has does have it included, but good as an alternative

    how would you enter e^1 if you dont have the e button? (might be a stupid question.....)
    My calculator has an e^x button.
  8. Offline

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    (Original post by SimonM)
    My calculator has an e^x button.
    ah right, fair enough :o:

    Just noticed mine has one too, funnily enough it's the same button which you use for ln :p:
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    amazing i have been trying to figure this out all day thank you soooo much

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