I'm not talking about logarithms like $\log_2 \sqrt{32}$, that's really easy for me. I want to calculate without tables logarithms like $\log 17$ or $\ln 912$. Can you tell me how I can do it, please?
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It's so good and it has a proof, but slow. Thank you anyway! – HACHE DOS O Oct 19 '20 at 19:04
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I appreciate the humid humor of your logo. – Jean Marie Oct 19 '20 at 19:43
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Sometimes it's good to reflect on why one would need to compute logarithms in the way you are requesting. In pure mathematics, $\log 17$ is a perfectly good number, and it is in fact better to write $\log 17$ than $1.30...$, as the latter notation is only as good as the number of digits we supply. Consider the formula for the area of a circle. We don't say area = $3.14r^2$, nor do we say area = $3.1415926535r^2$; we say area = $\pi r^2$, and with good reason. $\pi$ is used to represent the exact ratio of a circle's circumference to its diameter. – Joe Oct 19 '20 at 21:40