`ln` and `log` are synonyms for the natural logarithm function:

>>> ln == log
True
>>> log(E),ln(E)
(1, 1)
>>> log(100, 10)
2

On Tuesday, May 11, 2021 at 12:54:49 PM UTC-5 santiago gonzalez wrote:

> When I was doing my homework at the university, I got a result that I did 
> not expect, checking my code well, I found a bug. It turns out that the 
> script of a function gave me wrong, at first I thought it was wrong, but 
> after doing the derivative by definition I realized that the library gave 
> me the wrong derivative,
> I show the screenshot for more details.
> the sympy version used is 1.7.1
>

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