HP Forums
HP 49g+ Graphing Help Needed - 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+ Graphing Help Needed (/thread-79602.html)

HP 49g+ Graphing Help Needed - John Bower - 10-12-2005

I have a new HP 49g+ and I'm having touble with graphing a certain function. The textbook asked me to graph this function: g(x)=x(x-1)(x+2)(x-3). But when I ty to do it, the calculator gives me an "Error: Invalid User Function." Thanks.


Re: HP 49g+ Graphing Help Needed - Gene Wright - 10-12-2005

First guess: You've typed the function in with the implied multiplication. Can't do it that way. You'll have to type X * (x-1)*(x+2)*(x-3) in the EQ section of the plot setup window.

Second guess: You put the g(x) portion of the equation somewhere.

Take a look here for help with the basics of plotting equations:



Re: HP 49g+ Graphing Help Needed - Eddie Shore - 10-13-2005


The 49g+ does not accept implied multiplication. It will be important to actually put the multiplication sign between each factor.

e.g. g(x)=x*(x-1)*(x+2)*(x-3)

Since you want to define the equation as g(x) [instead of y##(x)] you make want to put the equation on stack and executing the STEQ (Store Equation) command. STEQ is only available on the catalog or it is easier to just type the command.