HP 49g+ Graphing Help Needed « Next Oldest | Next Newest »

 ▼ John Bower Junior Member Posts: 6 Threads: 4 Joined: Jan 1970 10-12-2005, 03:00 PM 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. John ▼ Gene Wright Posting Freak Posts: 1,545 Threads: 168 Joined: Jul 2005 10-12-2005, 03:27 PM 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: http://www.hp.com/calculators/docs/learning_modules/49gplus/49gPlusPlotting.pdf Gene Eddie Shore Senior Member Posts: 260 Threads: 40 Joined: Jan 1970 10-13-2005, 08:15 AM John, 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.

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