Texas Instruments TI-89 Titanium Short User Manual page 194

fMax()
MATH/Calculus menu
expression, var
fMax(
Returns a Boolean expression specifying
candidate values of
or locate its least upper bound.
Use the "|" operator to restrict the solution
interval and/or specify the sign of other undefined
variables.
For the
mode,
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()
MATH/Calculus menu
expression, var
fMin(
Returns a Boolean expression specifying
candidate values of
locate its greatest lower bound.
Use the "|" operator to restrict the solution
interval and/or specify the sign of other undefined
variables.
For the
mode,
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
FnOff
CATALOG
FnOff
Deselects all Y= functions for the current
graphing mode.
In split-screen, two-graph mode,
applies to the active graph.
FnOff [1] [, 2] ... [,99]
Deselects the specified Y= functions for the
current graphing mode.
FnOn
CATALOG
FnOn
Selects all Y= functions that are defined for the
current graphing mode.
In split-screen, two-graph mode,
applies to the active graph.
188
) ⇒
Boolean expression
that maximize
var
setting of the
APPROX
iteratively searches for one
fMax()
and
fMin() max()
) ⇒
Boolean expression
var that minimize
setting of the
APPROX
iteratively searches for one
fMin()
and
fMax() min()
fMax(1ì (xì a)^2ì (xì b)^2,x)
¸
expression
fMax(.5x^3ì xì 2,x) ¸
fMax(.5x^3ì xì 2,x)|x 1 ¸
fMax(aù x^2,x) ¸
Exact/Approx
fMax(aù x^2,x)|a<0 ¸
.
fMin(1ì (xì a)^2ì (xì b)^2,x)
¸
expression or
fMin(.5x^3ì xì 2,x)|x‚1 ¸ x = 1
fMin(aù x^2,x) ¸
fMin(aù x^2,x)|a>0 and x>1 ¸
Exact/Approx
fMin(aù x^2,x)|a>0 ¸
.
only
FnOff
In function graphing mode:
In parametric graphing mode:
only
FnOn
Appendix A: Functions and Instructions
ë
x = ˆ or x = ˆ or x = 0 or a = 0
ë
x = ˆ or x = ˆ or x = 0 or a = 0
deselects
FnOff 1,3 ¸
.
y3(x)
deselects
FnOff 1,3 ¸
, and .
xt3(t) yt3(t)
a+b
x =
2
x = ˆ
ë
x = .816 ...
x = 0
ë
x = ˆ or x = ˆ
x = 1.
x = 0
and
y1(x)
, ,
xt1(t) yt1(t)