diferenzation

[ralphinge123]

test.txt
I will share an example of derivation with determination of the arc length.
Once with the slope function and then with the correct derivative
mfg ralph breker

[Proektsoftbg]

@ralphinge123, thank you for your example. Now I will implement complex step method as $csdiff, alternative to $slope. It will provide much greater precision. You can try it by switching to comlex mode and replacing line 6
f_1(x) = $Slope{f(ξ) @ ξ = x}
with
f_1(x) = im(f(x + i*10^-20)).

After implementation, switching to complex mode will not be required anymore.