Casio FX-300MS Calculator
Problem for Casio FX-300MS Calculator

How to calculate ln using fx-991ms




By architect_sp on Nov 01, 2009

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how to calculate ln using fx-991ms

Solution #1

posted on Nov 01, 2009
Not Rated)

k24674

Rank: Guru  Casio Office Equipment  Expert
Rating: 87%, 705 votes
Hello, There is a key for that, the one labeled [ln] for natural logarithm. For log in base 10 use the key [LOG] [LN] 10 [ENTER] gives 2.302585093. As you certainly know, you cannot take the logarithm of a negative number, nor of Zero.
Hope it helps.
Comments:

Nov 02, 2009

- OOPS. Should read: For log in base 10 use the key [LOG]. Thus [LOG]10 [ENTER] gives 2.302585093
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