Texas Instruments TI-86 - Manual (Page 66)

54
Chapter 3: Math, Calculus, and Test Operations
03MATH.DOC TI-86, Chap 3, US English Bob Fedorisko Revised: 02/13/01 2:19 PM Printed: 02/13/01 3:00 PM Page 54 of 10 03MATH.DOC TI-86, Chap 3, US English Bob Fedorisko Revised: 02/13/01 2:19 PM Printed: 02/13/01 3:00 PM Page 54 of 10 03MATH.DOC TI-86, Chap 3, US English Bob Fedorisko Revised: 02/13/01 2:19 PM Printed: 02/13/01 3:00 PM Page 54 of 10
The CALC (Calculus) Menu
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evalF nDer der1 der2 fnInt 4 fMin fMax arc
The calculus functions return values with respect to any user-created variable, to built-in
variables
eqn and exp , and to graphing variables such as x , t , and q .
evalF( expression , variable , value ) Returns the value of expression with respect to variable for a
given variable value
nDer( expression , variable
ã
, value
ä
) Returns an approximate numerical derivative of expression with
respect to variable for the current variable value or specified
variable value
der1( expression , variable
ã
, value
ä
) Returns the value of the first derivative of expression with respect to
variable
for the current variable value or specified variable value
der2( expression , variable
ã
, value
ä
) Returns the value of the second derivative of expression with respect
to variable for the current variable value or specified variable value
fnInt( expression , variable ,
lower , upper )
Returns the numerical integral of expression with respect to variable
between lower and upper boundaries
fMin( expression , variable ,
lower , upper )
Returns the minimum value of expression with respect to variable
between lower and upper boundaries
fMax( expression , variable ,
lower , upper )
Returns the maximum value of expression with respect to variable
between lower and upper boundaries
arc( expression , variable ,
start , end )
Returns the length of a segment of a curve defined by expression
with respect to variable between start and end
You must set Dec mode to
use the calculus functions.
For evalF, nDer, der1, and
der2
, variable can be a real
or complex number or list.
You can use der1 and der2 in
expression . You can use
nDer once in expression .
For fnInt, fMin, and fMax,
lower < upper must be true.