Posts: 97

Threads: 9

Joined: Nov 2011

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