Hello,
I am testing the ready-made integration questions in STACK and realized that the automatic feedback provided by STACK does some strange factorization.
Please see for example the attached screenshot (question CR-Int-17-misc-07).
Is this a bug or is there some way to solve this?
Cheers,
Mikko
Mikko,
The answer test only has the *teacher's answer*. To provide this feedback, the system has to infer what the teacher has set in the question. This includes stripping off constants of integration. Constants of integration may occur in a number of ways, e.g.
\[ \int \frac{1}{x}\mathrm{d}x = \ln(kx).\]
I agree the feedback looks very odd. I think this code needs to be re-factored, but I'm not sure how. I've added an issue so I don't loose this suggestion. https://github.com/maths/moodle-qtype_stack/issues/126
When this happens, use the "Quiet" option and provide bespoke feedback for this question. I'm sorry this happens in a demo question....
Ok,
My fix here (which is long overdue, so thanks for posting) is documented in the appropriate place on
https://github.com/maths/moodle-qtype_stack/blob/master/doc/en/Authoring/Answer_tests.md
Chris
