Casio fx-7400G PLUS Using

A Resource for Free-standing Mathematics Qualifications
Using the CASIO fx-7400G PLUS
CALCULATIONS
Use MENU 1 (RUN)
Negative Numbers
Powers Use the ^ button, including brackets if necessary
eg to find 2
Exponential Function
Memories To recall/use the previous answer press Ans i.e. SHIFT(–).
To store a number in a memory, press →
To recall/use press ALPHA A (or B, C, ...)
TO DRAW THE GRAPH OF A FUNCTION
Use MENU 4 (GRAPH)
• To delete previous functions, press DEL (F2) then YES (F1).
• If you need to change the type of function, press
Y= (for a function) or PARM (for points)
Pressing the arrow again allows you to choose inequalities
and pressing it again takes you back to the start.
• To draw the graph of a function use the X, T button for the variable (even if a
different letter is used). After entering the function, press EXE then DRAW (F4).
• To correct a mistake use
then until you get to the error to over-write it.
• To keep a function in the memory, but stop it being drawn press SEL (F1).
• To set co-ordinates for a good picture of the graph, press V-Window (SHIFT F3)
then enter the values you require for the axes. You will need to press EXE after
each entry and use
• To zoom in or out press Zoom (SHIFT F2), then IN (F3) or OUT (F4).
If you wish to change the scale factor for zooming use FACT (F2).
To zoom in on a particular section of the graph press Box (F1), then use the
arrows on the REPLAY button to move the cursor to where you want one corner
of the box to be. Press EXE to set that corner, then use the arrows again to draw
the box. Press EXE again when the box is as you want it. The section of the
graph in the box will be enlarged to fill the screen.
To return to the original graph, press Zoom again then
select the ORIG (F1) option.
• To find the coordinates of important points on a curve use Trace (SHIFT F1),
then the arrows on the REPLAY button. Press QUIT when you are finished.
© The Nuffield Foundation
Use the (–) button
when t is 60, press 2 ^ ( 0.05 × 60 )
0.05t
x
Use the e button (i.e. SHIFT ln)
0.05t
eg to find e
or on the REPLY button to highlight the function,
on the REPLAY button to get to the Y menu.
1
Using the Casio fx-7400G PLUS
( 0.05 × 60 )
x
when t is 60, press e
→ ALPHA A (or B, C, ...) EXE
and select from
so that you can
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