HP 48gII Manual do Utilizador descarregar pdf (Página 69)

Page 3-16

To copy the value of Vm to the stack, select the variable name, and

press !

STK

, then, press

@UIT@

. For the calculator set to the ALG, the screen

will look like this:

The display shows what is called a tagged value,



. In here,

Vm, is the tag of this result. Any arithmetic operation with this number will

ignore the tag. Try, for example:

‚¹2*„î `

which produces:

The same operation in RPN mode will require the following keystrokes (after

the value of Vm was extracted from the constants library):

2`*‚¹

Defining and using functions

Users can define their own functions by using the DEFINE command available

thought the keystroke sequence „à (associated with the 2 key). The

function must be entered in the following format:

Function_name(arguments) = expression_containing_arguments

For example, we could define a simple function

H(x) = ln(x+1) + exp(-x)

Suppose that you have a need to evaluate this function for a number of

discrete values and, therefore, you want to be able to press a single button

1 2 ... 64 65 66 67 68 69 70 71 72 73 74 ... 174 175

Sem comentários

HP 48gII Manual do Utilizador Página 69