integrate(diff(f,x),x) actually yields you -1/(x + 1) + constant C
when u set C = 1, it becomes x/(x + 1)
On Tuesday, 24 June 2025 at 18:38:45 UTC+8 anso...@googlemail.com wrote:
> What am I doing wrong?
>
> >>> from sympy import * # Version 1.13.2
> >>> x = symbols("x")
> >>> f = x / (x+1)
> >>> f
> x/(x + 1)
> >>> integrate(diff(f,x),x) # should be x/(x+1)
> -1/(x + 1)
>
> diff seems correct - what about integrate?
>
> Can anyone help?
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