Texas Instruments TI-89 Titanium User Manual

Appendix A: Functions and Instructions 797
Use the “|” operator to restrict the solution interval
and/or specify the sign of other undefined variables.
For the
APPROX setting of the Exact/Approx mode,
fMax() iteratively searches for one approximate
local maximum. This is often faster, particularly if
you use the “|” operator to constrain the search to a
relatively small interval that contains exactly one
local maximum.
Note: See also
fMin() and max() .
fMax(.5x^3ì xì 2,x)|xc1 ¸
x = ë.816 ...
fMax(aù x^2,x) ¸
x
= ˆ or x = ë ˆ or x = 0 or a = 0
fMax(aù x^2,x)|a<0
¸ x = 0
fMin() MATH/Calculus menu
fMin( expression, var ) ⇒ Boolean expression
Returns a Boolean expression specifying candidate
values of
var that minimize expression or locate its
greatest lower bound.
Use the “|” operator to restrict the solution interval
and/or specify the sign of other undefined variables.
For the
APPROX setting of the Exact/Approx mode,
fMin() iteratively searches for one approximate local
minimum. This is often faster, particularly if you use
the “|” operator to constrain the search to a relatively
small interval that contains exactly one local
minimum.
Note: See also
fMax() and min() .
fMin(1ì (xì a)^2ì (xì b)^2,x) ¸
x
= ˆ or x = ë ˆ
fMin(.5x^3ì xì 2,x)|x‚1
¸ x = 1
fMin(aù x^2,x)
¸
x
= ˆ or x = ë ˆ or x = 0 or a = 0
fMin(aù x^2,x)|a>0 and x>1
¸
x
= 1.
fMin(aù x^2,x)|a>0
¸ x = 0
FnOff CATALOG
FnOff
Deselects all Y= functions for the current graphing
mode.
In split-screen, two-graph mode,
FnOff only applies
to the active graph.
FnOff [1] [, 2] ... [,99]
Deselects the specified Y= functions for the current
graphing mode.
In function graphing mode:
FnOff 1,3 ¸ deselects y1(x) and
y3(x) .
In parametric graphing mode:
FnOff 1,3 ¸ deselects xt1(t) , yt1(t) ,
xt3(t) , and yt3(t) .
FnOn CATALOG
FnOn
Selects all Y= functions that are defined for the
current graphing mode.
In split-screen, two-graph mode,
FnOn only applies
to the active graph.
FnOn [1] [, 2] ... [,99]
Selects the specified Y= functions for the current
graphing mode.
Note: In 3D graphing mode, only one function at a
time can be selected.
FnOn 2 selects z2(x,y) and
deselects any previously selected function. In the
other graph modes, previously selected functions
are not affected.

Texas Instruments TI-89 Titanium Specifications

General

Brand	Texas Instruments
Model	TI-89 Titanium
Category	Calculator
Language	English