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- From: goddard@NeXTwork.Rose-Hulman.Edu (Bart Goddard)
- Newsgroups: sci.math
- Subject: Re: Calculus and Mathematica
- Message-ID: <1992Aug19.184234.5437@cs.rose-hulman.edu>
- Date: 19 Aug 92 18:42:34 GMT
- Article-I.D.: cs.1992Aug19.184234.5437
- References: <1992Aug19.174230.21555@alchemy.chem.utoronto.ca>
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- Organization: Rose-Hulman Institute of Technology
- Lines: 43
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-
- In article <1992Aug19.174230.21555@alchemy.chem.utoronto.ca>
- mroussel@alchemy.chem.utoronto.ca (Marc Roussel) writes:
- > In article <1992Aug19.163805.3972@cs.rose-hulman.edu>
- > goddard@NeXTwork.Rose-Hulman.Edu (Bart Goddard) writes:
- > >Last year, I gave the
- > >new class roughly the same list (but longer) and had them integrate
- > >them on the machine. (I had to check that the maching could do all
- of
- > >them before I made the assignment. If the machine can't, the
- problem
- > >isn't a good example for this exercise.)
- >
- > Did you eventually show your students examples the computers
- > screwed up badly? Integration is the one thing which computer
- algebra
- > systems all claim to do, but can't handle reliably. If you use one
- of these
- > systems in your classes, you have to show the students just how
- > dangerously stupid these things are.
- >
- > Marc R. Roussel
- > mroussel@alchemy.chem.utoronto.ca
- In a way. There is no trouble finding ample problems of any type with
- which the machine has trouble. I didn't present these as a set of
- isolated pathological cases. Instead, the tack of the course is
- different. With a CAS available, one can explore more of a problem
- than was previously practicle. You shouldn't just "do the integral",
- but also make appropriate graphs, calculations, whatever to make sure
- your result makes sense, and to make sure you have covered all facets
- of the problem. The functions in max/min problems should be plotted
- and the critical points estimated and checked against the zeros of the
- derivative. Plotting the integrand may reveal a singularity to a
- student who may have missed an improper integral otherwise.
-
- SOOOOOOooooo, since we never did anything in isolation, the "danger" is
- considerably reduced, PLUS we got to emphasize problem solving more.
- After all is said and done, you want the bridge to really support the
- truck, and you would check your work in many ways. This helps a
- student to see how different parts of mathematics relate.
-
- Bart Goddard
- goddard@nextwork.rose-hulman.edu
-