HP 49g+ User Manual page 442

•
Two lists, the first one indicates the variation of the function (i.e.,
where it increases or decreases) in terms of the independent variable
VX, the second one indicates the variation of the function in terms of
the dependent variable.
•
A graphic object showing how the variation table was computed.
Example: Analyze the function Y = X
TABVAR. Use the following keystrokes, in RPN mode:
'X^3-4*X^2-11*X+30' `‚N ~t(select TABVAR) @@OK@@
This is what the calculator shows in stack level 1:
This is a graphic object. To be able to the result in its entirety, press ˜.
The variation table of the function is shown as follows:
Press $ to recover normal calculator display. Press ƒ to drop this last
result from the stack.
Two lists, corresponding to the top and bottom rows of the graphics matrix
shown earlier, now occupy level 1. These lists may be useful for
programming purposes. Press ƒ to drop this last result from the stack.
3 2
-4X -11X+30, using the function
Page 13-11