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MrJones2015 asked this question about How Not to Be Wrong: The Power of Mathematical Thinking:
In the chapter "A Note on the logarithm, and the flogartithm" (page 139) Jordan says: ln(1000)=4, ln(1mn)=7 and ln(1bn)=10. But according to my calculator it is: ln(1000)=6.9, ln(1mn)=13.8 and ln(1bn)=20.7 Whats wrong here?
Nitesh Kanthaliya ln(10000) is not equal to 4 but log(10000)=4. ln the former case log has base as e, but in the latter case, log has base 10. In calculator, when you p…moreln(10000) is not equal to 4 but log(10000)=4. ln the former case log has base as e, but in the latter case, log has base 10. In calculator, when you press ln, it takes base as e and hence the answer. Hope it clarifies.(less)
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How Not to Be Wrong
by Jordan Ellenberg
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