HP 48gII Graphing Calculator Bedienungsanleitung PDF herunterladen (Seite 388)

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curves intercept at two points. Move the cursor near the left intercept

point and press @)@FCN! @ISECT, to get I-SECT: (-0.6834…,0.21585).

Press L to recover the menu.

• To leave the FCN environment, press @)PICT (or L)PICT).

• Press @CANCL to return to the PLOT WINDOW environment. Then,

press L @@@OK@@@ to return to normal calculator display.

Note: the stack will show all the graph operations performed, properly

identified.

• Enter the PLOT environment by pressing, simultaneously if in RPN

mode, „ñ. Notice that the highlighted field in the PLOT

environment now contains the derivative of Y1(X). Press L@@@OK@@@ to

return to return to normal calculator display.

• Press ‚@@EQ@@ to check the contents of EQ. You will notice that it

contains a list instead of a single expression. The list has as elements

an expression for the derivative of Y1(X) and Y1(X) itself.

Originally, EQ contained only Y1(x). After we pressed @@F' @@ in the

@)FCN@ environment, the calculator automatically added the derivative of

Y1(x) to the list of equations in EQ.

Saving a graph for future use

If you want to save your graph to a variable, get into the PICTURE

environment by pressing š. Then, press @EDIT LL@PICT. This

captures the current picture into a graphics object. To return to the stack,

press @)PICT @CANCL.

In level 1 of the stack you will see a graphics object described as Graphic

131 × 64. This can be stored into a variable name, say, PIC1.

To display your figure again, recall the contents of variable PIC1 to the stack.

The stack will show the line: Graphic 131 × 64. To see the graph, enter

the PICTURE environment, by pressing š.

Clear the current picture, @EDIT L@ERASE.

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