Casio fx-7400G PLUS Using Manual

Also see for fx-7400G PLUS: User guide Product catalogue Specifications Specifications Programing manual

A Resource for Free-standing Mathematics Qualifications Using the Casio fx-7400G PLUS The Nuffield Foundation 1 Photo-copiableUsing the CASIO fx-7400G PLUSCALCULATIONSUse MENU 1 (RUN)Negative Numbers Use the (–) buttonPowers Use the ^ button, including brackets if necessaryeg to find 20.05t when t is 60, press 2 ^ ( 0.05 × 60 )Exponential Function Use the ex button (i.e. SHIFT ln)eg to find e0.05t when t is 60, press ex ( 0.05 × 60 )Memories To recall/use the previous answer press Ans i.e. SHIFT(–).To store a number in a memory, press →→ ALPHA A (or B, C, …) EXETo recall/use press ALPHA A (or B, C, …)TO DRAW THE GRAPH OF A FUNCTIONUse MENU 4 (GRAPH)• To delete previous functions, press DEL (F2) then YES (F1).• If you need to change the type of function, press and select fromY= (for a function) or PARM (for points)Pressing the arrow again allows you to choose inequalitiesand 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 adifferent letter is used). After entering the function, press EXE then DRAW (F4).• To correct a mistake use or on the REPLY button to highlight the function,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 aftereach entry and use on the REPLAY button to get to the Y menu.• 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 thearrows on the REPLAY button to move the cursor to where you want one cornerof the box to be. Press EXE to set that corner, then use the arrows again to drawthe box. Press EXE again when the box is as you want it. The section of thegraph in the box will be enlarged to fill the screen.To return to the original graph, press Zoom again then so that you canselect 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.

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