function analysis question

[quinyu]

Just tried what you proposed, namely domain(arcsin(sqrt(x))*1/((1/2-x)*(3/5-x)),x), and what I got was that x is not meant to be 1/2 or 3/5 and must be 0<=x<=1. With using decimal fractions, you do get the warning. Mine is not yellow, since I'm having the CAS, not the CX CAS - colors don't command such a big premium for me (I'd kill for a Classpad II though. :] ) In general, you are better off using proper fractions in CAS systems, and this isn't limited to those ones on various calculators.

The TI-89 Titanium has no domain function as of the last update, so I cannot test on that, nor on the TI-92 since that one lacks it as well.

Either way, even if it's at the level you say, it is handier than having no access to such functionality at all. Someone, perhaps, implement it for the next Prime firmware release? It should be easy, if what you wrote is true (namely, they are just having some basic algorithms to catch common items.) I wouldn't endeavour coding anything of the sort, I know that for sure =) but if Giac/Xcas already has it, maybe it won't take so long to get the HP developers enable it too... I can only hope.