I am using the EqualComAss test. Is there a possibility to recognize negative powers as inverses of positive powers (e.g. \(x^{-6}\) as \(1/x^6\)) and \(\sqrt{x}\) as \(x^{1/2}\) without having to set both of them as a correct answer in the prt?
Martin,
There isn't currently a mechanism to build arbitrary equivalence classes by choose subsets of the algebra rules, so I'm sorry but we don't have a test just for that. I can understand why it would be useful though!
Chris
Thanks for your answer. Is this feature planned in future versions?
Connected to the question about rational powers: If I put the term \(\frac{a \cdot b-a \cdot\sqrt{a}+b \cdot\sqrt{b}-\sqrt{a \cdot b}}{b^2-a}\) in the prt, STACK evaluates the same term as answer as wrong, while it returns \(\frac{a \cdot b-a^{3/2}+b^{3/2}-\sqrt{a \cdot b}}{b^2-a}\) as correct. How can I tell STACK that the term \(\frac{a \cdot b-a \cdot\sqrt{a}+b \cdot\sqrt{b}-\sqrt{a \cdot b}}{b^2-a}\) should also be correct?
Best,
Martin