Re: Hard or wanted CAS stuff Message #4 Posted by peacecalc on 15 Apr 2012, 9:53 a.m., in response to message #3 by Oliver Unter Ecker
Hello Oliver,
my problem with your question is, that I'm not as good in algebra like the HP 50g ;P. That means, when the calc isn't able to perform for instance an symbolic integral you have more possibilities:
a) there doesn't exist a closed form of the integral
b) it is a problem which can be solved with a little changement (substituion or partial fraction and so on)
c) there exists a solution, but in form of a sum with an infinite number of terms (like the solution of the mathematic pendicular without the approximation for small angles).
d) there exists a closed solution but the CAS doesn't find it.
and so on...
My solution for this is: IF the CAS failed THEN I keyed in the wrong input. Because there exist a) (see above), it is not always the right decision, but as a working hypothesis it leads you correctly (I'm hoping) through the mathematical fog.
Sincerely
peacecalc
