Hp 49g Graphing Calculator Manual de usuario descargar pdf (Pagina 106)

The tools discussed below are available from the functions sub-menu

(labeled fcn on the PICT menu).

1. Press FCN to display the FUNCTIONS menu.

2. Press the function key for the analysis tool you want.

Wlien you choose a fimction analysis tool, the menu is hidden to make

room for the result. You can restore the menu by pressing any one of the

fimction keys; (FD to {£6).

Finding roots

A root is a point where a graph meets or crosses the x axis. To find the

root closest to the cursor, press ROOT on the FUNCTIONS menu.

If the root is within the display area, the cursor moves to the root and the

value of the root is displayed near the bottom left comer of the screen. If

tlie root is not within the display area, the cursor remains where it is, the

message OFF SCREEN is briefly displayed, and the value of the root is

displayed near the bottom left comer of the screen.

If you want to find another root, move the cursor so that it is closer to that

root than to any other root before selecting ROOT.

The message “Constant?” appears on the screen if the same value was

calculated at every sample point.

Function analysis tools list

Finding extrema

An extremum is the maximum or minimum value. To find the extrema

closest to the cursor, press extr on the functions menu.

If an extremum is within tire display area, the cursor moves to the point

and the x and y coordinates of the extremum are displayed near the

bottom left corner of the screen. If the extremum is not within the display

area, the cursor remains where it is, the message OFF SCREEN is briefly

displayed, and the x and y coordinates of the extreimun are displayed

near the bottom left comer of the screen.

If the derivative changes sign at the extremum, the message “Sign

Reversal” briefly appears on the screen before the coordinates are

displayed.

Page 4-38

Plotting graphs

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Hp 49g Graphing Calculator Manual de usuario Pagina 106