I need help urgently: I want to plot 3D functions (Fast 3D). I can enter the function and hit Erase and Draw. THE PROBLEM IS: instead of getting a Y1=. like the manual says when I press white-arrow Y= simulstaneously, I am getting instead X1(X,Y)=.
Can someone send me a function and the instructions of what I had to do to get that functions graph in 3D?
;
thanks
John
Pittsburgh