![]() Nevertheless, it is limited to the introductory method to solving Differential Equations called Separation of Variables. ![]() Even Differential Equations can be solved Step by Step on the TI 89 Titanium using this app. Thus, Step by Step Implicit Differentiation, Step by Step Polar and Parametric Equations, Step by Step Partial Derivatives and Step by Step Lagrange Multipliers are all integrated. (Personally, I made it through high school and then up through upper-level undergraduate mathematics, physics, econometrics, etc. Learning how to use a calculator is perhaps a useful skill, but it's one that can be learned quickly if needed and should not be pervasively required: for most math done for math's sake (that is, as opposed to computations for some engineering problem), students would be better off if teachers instead made problems that could easily be worked with pen and paper. That these devices are absurdly overpriced compared to the state of the art ($100 multipurpose netbooks, for instance), and that the models required are made by a single company with monopolistic coordination with standardized tests and textbooks, only make things worse. For the material it is used for (introductory calculus) and the way it is used, one of these TI calculators hurts student learning and understanding more than it helps, and there is no excuse for schools to force students to purchase a $100 piece of electronics without a damn good reason. Education and sometimes distributed for free, all American High Schoolers use it, and did so for at least the last 10 years.) It's a bit off the subject, but this has always struck me as a terrible scam. ![]() ![]() The final processing involved finding the null space of a 5.4 million x 5.4 million matrix.
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