Functions Deriv And Dervx - HP 49g+ User Manual

where the limit is to be calculated.
‚ N ~ „ l
command catalog (
SERIES... of the CALC menu (see above).
Function lim is entered in ALG mode as
limit lim f ( x ) . In RPN mode, enter the function first, then the expression
x a
'x=a', and finally function lim. Examples in ALG mode are shown next,
including some limits to infinity.
The infinity symbol is associated with the

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 (
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.
Function lim is available through the
) or through option 2. LIMITS &
l i m ( f ( x ) , x = a )
key, i.e..,
0
) .
„ Ö
to calculate the
.
„ è
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