HP Forums
HP 49g+ - Printable Version

+- HP Forums (https://archived.hpcalc.org/museumforum)
+-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html)
+--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html)
+--- Thread: HP 49g+ (/thread-146790.html)



HP 49g+ - Fernando - 02-11-2009

Hi all...

Can someone tell me please why when I enter:

DERVX(X^2)

I get 0 (zero)

I already set functions to symbolic and the
arithmetic mode is set to exact, what am I doing wrong?

thanks in advanced




Re: HP 49g+ - Tim Wessman - 02-12-2009

http://forums11.itrc.hp.com/service/forums/bizsupport/questionanswer.do?threadId=1310990

TW


Re: HP 49g+ - Marcus von Cube, Germany - 02-13-2009

Check if variable X is defined and purge it. If X is defined, X^2 evaluates to a constant of which the derivative is zero.