Problem 43035. Non trivial identities - differentiation

Created by Massimo Zanetti

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Last Solution submitted on Sep 04, 2020

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goc3 on 7 Oct 2016

I'm confused by this problem. It requires the use of diff() and asks for differentiation, but it tests for equality with the input variable...

Gareth Lee on 21 Oct 2016

the author had proposed lots of questions with meaningless test. i despise this behavior

Rafael S.T. Vieira on 4 Sep 2020 at 1:38

I understood this set of problems. The author wants us to use a function on x and then recover the original x (therefore an identity). However, It would be probably better if the test suite gave us the modified x (with additional necessary parameters) and demanded the original. That goes for all his problems of this kind.

Gareth, my guess is that he is not doing this on purpose, he only needs to improve his test suite. Currently it is very easy to give a phony solution.

Rafael S.T. Vieira on 4 Sep 2020 at 1:40

For instance a better problem description would be return the ORIGINAL x after differentiating it.

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Problem 43035. Non trivial identities - differentiation

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Problem 43035. Non trivial identities - differentiation

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