Texas Instruments TI-83 Manual Book page 73

nDeriv(
(numerical derivative) returns an approximate derivative of
nDeriv(
with respect to
expression
derivative and H (if not specified, the default is 1âL3).
for real numbers.
nDeriv( expression , variable , value
uses the symmetric difference quotient method, which
nDeriv(
approximates the numerical derivative value as the slope of the secant
line through these points.
f ( x
f ( ' x )
As H becomes smaller, the approximation usually becomes more
accurate.
You can use
nDeriv(
calculate
nDeriv(
nondifferentiable point.
TI-83 Plus Math, Angle, and Test Operations
variable
[
,
) ( f ( x )
2
once in
expression
, the TI-83 Plus
, given the
value
H]
)
. Because of the method used to
can return a false derivative value at a
at which to calculate the
is valid only
nDeriv(
70