HP 48gII Graphing Calculator Manual do Utilizador descarregar pdf (Página 438)

The derivative of a function f(x) at x = a is defined as the limit

Some examples of derivatives using this limit are shown in the following

screen shots:

Functions DERIV and DERVX

The function DERIV is used to take derivatives in terms of any independent

variable, while the function DERVX takes derivatives with respect to the CAS

default variable VX (typically ‘X’). While function DERVX is available directly

in the CALC menu, both functions are available in the DERIV.&INTEG sub-

menu within the CALCL menu ( „Ö).

Function DERIV requires a function, say f(t), and an independent variable, say,

t, while function DERVX requires only a function of VX. Examples are shown

next in ALG mode. Recall that in RPN mode the arguments must be entered

before the function is applied.

The DERIV&INTEG menu

The functions available in this sub-menu are listed below:

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HP 48gII Graphing Calculator Manual do Utilizador Página 438