HP Prime too complicated

07122018, 03:25 PM
Post: #35




RE: HP Prime too complicated
(07122018 02:39 PM)sasa Wrote: One particular part where CAS may choose longer path may be following: I think it all depends on context. If that matrix was given to a student that is learning matrices and determinants, you are 100% correct: they are better off learning "oldfashioned" way. However, in more advanced courses, that matrix might come as part of a system of equations to solve a physics problem. In that case, I much rather prefer the student's mind focused on the physics than on rowreduction, and it helps to be able to get that determinant with a single keystroke. The student does need to know that getting a zero determinant means his formulation of the physics problem was either incorrect or simply has infinite solutions, and his mind needs to go back at the physics model and equations that gave origin to the matrix to see what went wrong (bad model, or if you are designing something, perhaps an accurate model of a bad design). In this context, the procedure to get that determinant is a mere "distraction" from the actual problem. In the end, you need to have a calculator that is capable of doing it all, it's up to the user to use that power wisely in each context. That context will change dramatically over the life of that student, so it's important to keep an open mind, people can't expect to limit the capabilities of a product based on the limited scope of its own context at one point in time. 

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